42 results on '"Byrne, Rachel"'
Search Results
2. Evaluation of eight lateral flow tests for the detection of anti-SARS-CoV-2 antibodies in a vaccinated population
- Author
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Greenland-Bews, Caitlin, Byrne, Rachel L., Owen, Sophie I., Watkins, Rachel L., Bengey, Daisy, Buist, Kate, Clerkin, Karina, Escadafal, Camille, Finch, Lorna S., Gould, Susan, Giorgi, Emanuele, Hodgkinson, Andy, Mashenko, Larysa, Powell, Darren, Savage, Helen R., Thompson, Caitlin R., Turtle, Lance, Wardale, Jahanara, Wooding, Dominic, Edwards, Thomas, Atienzar, Ana Cubas, and Adams, Emily R.
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- 2023
- Full Text
- View/download PDF
3. Women with cerebral palsy: A qualitative study about their experiences with sexual and reproductive health education and services.
- Author
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Gray, Susan, Byrne, Rachel, Christensen, Sinead, Williams, David, Wylie, Molly, Fowler, Eileen, Gaebler-Spira, Deborah, Marciniak, Christina, and Glader, Laurie
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Health education ,cerebral palsy ,reproductive health ,sexual education ,Adult ,Cerebral Palsy ,Female ,Focus Groups ,Health Services Accessibility ,Humans ,Qualitative Research ,Reproductive Health ,Reproductive Health Services - Abstract
PURPOSE: To explore the recalled experiences of women with CP regarding sexual health education and services they received. METHODS: Semi-structured interviews and focus groups were conducted at four academic tertiary hospitals with 33 adult women with CP. Templates were used to ask about four key content domains: appointment planning (including planning for a gynecologic exam), accessibility of services, experiences with providers, and recommendations for improvement. Sessions were transcribed verbatim and analyzed to generate a coding dictionary. Blinded coding was carried out for each transcript, with duplicate coding used to confirm identified themes. Iterative analysis was used to identify and consolidate coding and key themes. RESULTS: Similar barriers were discussed at the four sites, including lack of accessible exam tables, hospital staff unfamiliar with physical disabilities, and assumptions that women with CP are not sexually active. Many described the sexual education they received as brief, omitted, or mistimed. Self-advocacy was crucial, and recommended strategies ranged from pre-gynecologic exam medication to visit checklists. CONCLUSION: Reproductive health education for young women with CP is frequently inadequate. Medical professionals lack relevant knowledge and awareness; medical facilities lack necessary infrastructure. Recommendations for improvements are made.
- Published
- 2021
4. Investigating One Health risks for human colonisation with extended spectrum β-lactamase-producing Escherichia coli and Klebsiella pneumoniae in Malawian households: a longitudinal cohort study
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Cocker, Derek, Chidziwisano, Kondwani, Mphasa, Madalitso, Mwapasa, Taonga, Lewis, Joseph M, Rowlingson, Barry, Sammarro, Melodie, Bakali, Winnie, Salifu, Chifundo, Zuza, Allan, Charles, Mary, Mandula, Tamandani, Maiden, Victor, Amos, Stevie, Jacob, Shevin T, Kajumbula, Henry, Mugisha, Lawrence, Musoke, David, Byrne, Rachel, Edwards, Thomas, Lester, Rebecca, Elviss, Nicola, Roberts, Adam P, Singer, Andrew C, Jewell, Christopher, Morse, Tracy, and Feasey, Nicholas A
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- 2023
- Full Text
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5. Network Implementation of Guideline for Early Detection Decreases Age at Cerebral Palsy Diagnosis.
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Maitre, Nathalie, Burton, Vera, Duncan, Andrea, Iyer, Sai, Ostrander, Betsy, Winter, Sarah, Ayala, Lauren, Burkhardt, Stephanie, Gerner, Gwendolyn, Getachew, Ruth, Jiang, Kelsey, Lesher, Laurie, Perez, Carrie, Moore-Clingenpeel, Melissa, Lam, Rebecca, Lewandowski, Dennis, and Byrne, Rachel
- Subjects
Age Factors ,Cerebral Palsy ,Community Networks ,Early Diagnosis ,Female ,Humans ,Infant ,Male ,Neurologic Examination ,Practice Guidelines as Topic ,Quality Improvement - Abstract
BACKGROUND AND OBJECTIVES: Early diagnosis of cerebral palsy (CP) is critical in obtaining evidence-based interventions when plasticity is greatest. In 2017, international guidelines for early detection of CP were published on the basis of a systematic review of evidence. Our study aim was to reduce the age at CP diagnosis throughout a network of 5 diverse US high-risk infant follow-up programs through consistent implementation of these guidelines. METHODS: The study leveraged plan-do-study-act and Lean methodologies. The primary outcome was age at CP diagnosis. Data were acquired during the corresponding 9-month baseline and quarterly throughout study. Balancing measures were clinic no-show rates and parent perception of the diagnosis visit. Clinic teams conducted strengths, weaknesses, opportunities, and threats analyses, process flow evaluations, standardized assessments training, and parent questionnaires. Performance of a 3- to 4-month clinic visit was a critical process step because it included a Hammersmith Infant Neurologic Examination, a General Movements Assessment, and standardized assessments of motor function. RESULTS: The age at CP diagnosis decreased from a weighted average of 19.5 (95% confidence interval 16.2 to 22.8) to 9.5 months (95% confidence interval 4.5 to 14.6), with P = .008; 3- to 4-month visits per site increased from the median (interquartile range) 14 (5.2-73.7) to 54 (34.5-152.0), with P < .001; and no-show rates were not different. Parent questionnaires revealed positive provider perception with improvement opportunities for information content and understandability. CONCLUSIONS: Large-scale implementation of international guidelines for early detection of CP is feasible in diverse high-risk infant follow-up clinics. The initiative was received positively by families and without adversely affecting clinic operational flow. Additional parent support and education are necessary.
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- 2020
6. Stakeholder engagement in neonatal clinical trials: an opportunity for mild neonatal encephalopathy research
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Chalak, Lina, Pilon, Betsy, Byrne, Rachel, and Maitre, Nathalie
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- 2023
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7. HDL particle size is increased and HDL-cholesterol efflux is enhanced in type 1 diabetes: a cross-sectional study
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Ahmed, Mohamad O., Byrne, Rachel E., Pazderska, Agnieszka, Segurado, Ricardo, Guo, Weili, Gunness, Anjuli, Frizelle, Isolda, Sherlock, Mark, Ahmed, Khalid S., McGowan, Anne, Moore, Kevin, Boran, Gerard, McGillicuddy, Fiona C., and Gibney, James
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- 2021
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8. Factors associated with delayed diagnosis of leprosy in an endemic area in Northeastern Brazil: a cross-sectional study
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Santos, Glicya Monaly Claudino dos, primary, Byrne, Rachel L., additional, Cubas-Atienzar, Ana Isabel, additional, and Santos, Victor Santana, additional
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- 2024
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9. Self-sampling of capillary blood for SARS-CoV-2 serology
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Brown, Lottie, Byrne, Rachel L., Fraser, Alice, Owen, Sophie I., Cubas-Atienzar, Ana I., Williams, Christopher T., Kay, Grant A., Cuevas, Luis E., Fitchett, Joseph R. A., Fletcher, Tom, Garrod, Gala, Kontogianni, Konstantina, Krishna, Sanjeev, Menzies, Stefanie, Planche, Tim, Sainter, Chris, Staines, Henry M., Turtle, Lance, and Adams, Emily R.
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- 2021
- Full Text
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10. Glucose-6-phosphate dehydrogenase mutations in malaria endemic area of Thailand by multiplexed high‐resolution melting curve analysis
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Boonyuen, Usa, Songdej, Duantida, Tanyaratsrisakul, Sasipa, Phuanukoonnon, Suparat, Chamchoy, Kamonwan, Praoparotai, Aun, Pakparnich, Phonchanan, Sudsumrit, Sirapapha, Edwards, Thomas, Williams, Christopher T., Byrne, Rachel L., Adams, Emily R., and Imwong, Mallika
- Published
- 2021
- Full Text
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11. A comparison of helminth infections as assessed through coprological analysis and adult worm burdens in a wild host
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Byrne, Rachel L., Fogarty, Ursula, Mooney, Andrew, Marples, Nicola M., and Holland, Celia V.
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- 2018
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12. Streptococcus pneumoniae colonization associates with impaired adaptive immune responses against SARS-CoV-2
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Mitsi, Elena, Reine, Jesus, Urban, Britta C., Solorzano, Carla, Nikolaou, Elissavet, Hyder-Wright, Angela D., Pojar, Sherin, Howard, Ashleigh, Hitchins, Lisa, Glynn, Sharon, Farrar, Madlen C., Liatsikos, Konstantinos, Collins, Andrea M., Walker, Naomi F., Hill, Helen C., German, Esther L., Cheliotis, Katerina S., Byrne, Rachel L., Williams, Christopher T., Cubas-Atienzar, Ana I., Fletcher, Tom E., Adams, Emily R., Draper, Simon J., Pulido, David, Beavon, Rohini, Theilacker, Christian, Begier, Elizabeth, Jodar, Luis, Gessner, Bradford D., and Ferreira, Daniela M.
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Streptococcus pneumoniae -- Physiological aspects ,Immunological research ,Immune response -- Health aspects ,Host-bacteria relationships -- Research ,Streptococcal infections -- Complications and side effects ,Health care industry - Abstract
BACKGROUND. Although recent epidemiological data suggest that pneumococci may contribute to the risk of SARS-CoV-2 disease, cases of coinfection with Streptococcus pneumoniae in patients with coronavirus disease 2019 (COVID-19) during hospitalization have been reported infrequently. This apparent contradiction may be explained by interactions of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and pneumococci in the upper airway, resulting in the escape of SARS-CoV-2 from protective host immune responses. METHODS. Here, we investigated the relationship of these 2 respiratory pathogens in 2 distinct cohorts of health care workers with asymptomatic or mildly symptomatic SARS-CoV-2 infection identified by systematic screening and patients with moderate to severe disease who presented to the hospital. We assessed the effect of coinfection on host antibody, cellular, and inflammatory responses to the virus. RESULTS. In both cohorts, pneumococcal colonization was associated with diminished antiviral immune responses, which primarily affected mucosal IgA levels among individuals with mild or asymptomatic infection and cellular memory responses in infected patients. CONCLUSION. Our findings suggest that S. pneumoniae impair host immunity to SARS-CoV-2 and raise the question of whether pneumococcal carriage also enables immune escape of other respiratory viruses and facilitates reinfection. TRIAL REGISTRATION. ISRCTN89159899 (FASTER study) and ClinicalTrials.gov NCT03502291 (LAIV study)., Introduction Despite the widespread global effects of the coronavirus disease 2019 (COVID-19) pandemic, few reports have assessed potential interactions between upper airway bacterial colonization and severe acute respiratory syndrome coronavirus [...]
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- 2022
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13. Contextualizing disability: a cross-sectional analysis of the association between the built environment and functioning among people living with spinal cord injury in the United States
- Author
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Botticello, Amanda L., Tulsky, David, Heinemann, Allen, Charlifue, Susan, Kalpakjian, Claire, Slavin, Mary, Byrne, Rachel, and Rohrbach, Tanya
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- 2019
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14. Factors associated with delayed diagnosis of leprosy in an endemic area in Northeastern Brazil: a cross-sectional study.
- Author
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Claudino dos Santos, Glicya Monaly, Byrne, Rachel L., Isabel Cubas-Atienzar, Ana, and Santana Santos, Victor
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- 2024
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15. Drivers of Resistance in Uganda and Malawi (DRUM): a protocol for the evaluation of One-Health drivers of Extended Spectrum Beta Lactamase (ESBL) resistance in Low-Middle Income Countries (LMICs)
- Author
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Cocker, Derek, primary, Sammarro, Melodie, additional, Chidziwisano, Kondwani, additional, Elviss, Nicola, additional, Jacob, Shevin T., additional, Kajumbula, Henry, additional, Mugisha, Lawrence, additional, Musoke, David, additional, Musicha, Patrick, additional, Roberts, Adam P., additional, Rowlingson, Barry, additional, Singer, Andrew C., additional, Byrne, Rachel L., additional, Edwards, Thomas, additional, Lester, Rebecca, additional, Wilson, Catherine N., additional, Hollihead, Beth, additional, Thomson, Nicholas, additional, Jewell, Christopher P., additional, Morse, Tracy, additional, and Feasey, Nicholas A., additional
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- 2023
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16. JPRM cerebral palsy special issue 2023
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Kim, Heakyung, primary, Byrne, Rachel, additional, and Green, Michael, additional
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- 2023
- Full Text
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17. Drivers of resistance in Uganda and Malawi (DRUM): a protocol for the evaluation of One-Health drivers of extended spectrum beta lactamase (ESBL) resistance in low-middle income countries (LMICs)
- Author
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Cocker, Derek, Sammarro, Melodie, Chidziwisano, Kondwani, Elviss, Nicola, Jacob, Shevin T., Kajumbula, Henry, Mugisha, Lawrence, Musoke, David, Musicha, Patrick, Roberts, Adam P., Rowlingson, Barry, Singer, Andrew C., Byrne, Rachel L., Edwards, Thomas, Lester, Rebecca, Wilson, Catherine N., Hollihead, Beth, Thomson, Nicholas R., Jewell, Christopher P., Morse, Tracy, Feasey, Nicholas A., Cocker, Derek, Sammarro, Melodie, Chidziwisano, Kondwani, Elviss, Nicola, Jacob, Shevin T., Kajumbula, Henry, Mugisha, Lawrence, Musoke, David, Musicha, Patrick, Roberts, Adam P., Rowlingson, Barry, Singer, Andrew C., Byrne, Rachel L., Edwards, Thomas, Lester, Rebecca, Wilson, Catherine N., Hollihead, Beth, Thomson, Nicholas R., Jewell, Christopher P., Morse, Tracy, and Feasey, Nicholas A.
- Abstract
In sub-Saharan Africa (sSA), there is high morbidity and mortality from severe bacterial infection and this is compounded by antimicrobial resistance, in particular, resistance to 3rd-generation cephalosporins. This resistance is typically mediated by extended-spectrum beta lactamases (ESBLs). To interrupt ESBL transmission it will be important to investigate how human behaviour, water, sanitation, and hygiene (WASH) practices, environmental contamination, and antibiotic usage in both urban and rural settings interact to contribute to transmission of ESBL E. coli and ESBL K. pneumoniae between humans, animals, and the environment. Here we present the protocol for the Drivers of Resistance in Uganda and Malawi (DRUM) Consortium, in which we will collect demographic, geospatial, clinical, animal husbandry and WASH data from a total of 400 households in Uganda and Malawi. Longitudinal human, animal and environmental sampling at each household will be used to isolate ESBL E. coli and ESBL K. pneumoniae. This will be complimented by a Risks, Attitudes, Norms, Abilities and Self-Regulation (RANAS) survey and structured observations to understand the contextual and psychosocial drivers of regional WASH practices. Bacterial isolates and plate sweeps will be further characterised using a mixture of short-,long-read and metagenomic whole-genome sequencing. These datasets will be integrated into agent-based models to describe the transmission of EBSL resistance in Uganda and Malawi and allow us to inform the design of interventions for interrupting transmission of ESBL-bacteria.
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- 2023
18. An investigation of Mycobacterium bovis and helminth coinfection in the European badger Meles meles
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Kelly, David J., primary, Marples, Nicola M., additional, Byrne, Rachel L., additional, Fogarty, Ursula, additional, Kenny, Kevin, additional, Cameron, Henrietta, additional, Griffin, Denise, additional, and Holland, Celia V., additional
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- 2022
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19. Additional file 1 of Evaluation of eight lateral flow tests for the detection of anti-SARS-CoV-2 antibodies in a vaccinated population
- Author
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Greenland-Bews, Caitlin, Byrne, Rachel L., Owen, Sophie I., Watkins, Rachel L., Bengey, Daisy, Buist, Kate, Clerkin, Karina, Escadafal, Camille, Finch, Lorna S., Gould, Susan, Giorgi, Emanuele, Hodgkinson, Andy, Mashenko, Larysa, Powell, Darren, Savage, Helen R., Thompson, Caitlin R., Turtle, Lance, Wardale, Jahanara, Wooding, Dominic, Edwards, Thomas, Atienzar, Ana Cubas, and Adams, Emily R.
- Abstract
Additional file 1. Supplementary Materials.
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- 2023
- Full Text
- View/download PDF
20. Drivers of resistance in Uganda and Malawi (DRUM): a protocol for the evaluation of One-Health drivers of extended spectrum beta lactamase (ESBL) resistance in low-middle income countries (LMICs)
- Author
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Cocker, Derek, Sammarro, Melodie, Chidziwisano, Kondwani, Elviss, Nicola, Jacob, Shevin T., Kajumbula, Henry, Mugisha, Lawrence, Musoke, David, Musicha, Patrick, Roberts, Adam P., Rowlingson, Barry, Singer, Andrew C., Byrne, Rachel L., Edwards, Thomas, Lester, Rebecca, Wilson, Catherine N., Hollihead, Beth, Thomson, Nicholas, Jewell, Christopher P., Morse, Tracy, Feasey, Nicholas, Cocker, Derek, Sammarro, Melodie, Chidziwisano, Kondwani, Elviss, Nicola, Jacob, Shevin T., Kajumbula, Henry, Mugisha, Lawrence, Musoke, David, Musicha, Patrick, Roberts, Adam P., Rowlingson, Barry, Singer, Andrew C., Byrne, Rachel L., Edwards, Thomas, Lester, Rebecca, Wilson, Catherine N., Hollihead, Beth, Thomson, Nicholas, Jewell, Christopher P., Morse, Tracy, and Feasey, Nicholas
- Abstract
In sub-Saharan Africa (sSA), there is high morbidity and mortality from severe bacterial infection and this is compounded by antimicrobial resistance, in particular, resistance to 3rd-generation cephalosporins. This resistance is typically mediated by extended-spectrum beta lactamases (ESBLs). To interrupt ESBL transmission it will be important to investigate how human behaviour, water, sanitation, and hygiene (WASH) practices, environmental contamination, and antibiotic usage in both urban and rural settings interact to contribute to transmission of ESBL E. coli and ESBL K. pneumoniae between humans, animals, and the environment. Here we present the protocol for the Drivers of Resistance in Uganda and Malawi (DRUM) Consortium, in which we will collect demographic, geospatial, clinical, animal husbandry and WASH data from a total of 400 households in Uganda and Malawi. Longitudinal human, animal and environmental sampling at each household will be used to isolate ESBL E. coli and ESBL K. pneumoniae. This will be complimented by a Risks, Attitudes, Norms, Abilities and Self-Regulation (RANAS) survey and structured observations to understand the contextual and psychosocial drivers of regional WASH practices. Bacterial isolates and plate sweeps will be further characterised using a mixture of short-,long-read and metagenomic whole-genome sequencing. These datasets will be integrated into agent-based models to describe the transmission of EBSL resistance in Uganda and Malawi and allow us to inform the design of interventions for interrupting transmission of ESBL-bacteria.
- Published
- 2022
21. Drivers of Resistance in Uganda and Malawi (DRUM):a protocol for the evaluation of One-Health drivers of Extended Spectrum Beta Lactamase (ESBL) resistance in Low-Middle Income Countries (LMICs)
- Author
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Cocker, Derek, Sammarro, Melodie, Chidziwisano, Kondwani, Elviss, Nicola, Jacob, Shevin T., Kajumbula, Henry, Mugisha, Lawrence, Musoke, David, Musicha, Patrick, Roberts, Adam P., Rowlingson, Barry, Singer, Andrew C., Byrne, Rachel L., Edwards, Thomas, Lester, Rebecca, Wilson, Catherine, Hollihead, Beth, Thomson, Nicholas, Jewell, Christopher P., Morse, Tracy, Feasey, Nicholas, Cocker, Derek, Sammarro, Melodie, Chidziwisano, Kondwani, Elviss, Nicola, Jacob, Shevin T., Kajumbula, Henry, Mugisha, Lawrence, Musoke, David, Musicha, Patrick, Roberts, Adam P., Rowlingson, Barry, Singer, Andrew C., Byrne, Rachel L., Edwards, Thomas, Lester, Rebecca, Wilson, Catherine, Hollihead, Beth, Thomson, Nicholas, Jewell, Christopher P., Morse, Tracy, and Feasey, Nicholas
- Abstract
In sub-Saharan Africa (sSA), there is high morbidity and mortality from severe bacterial infection and this is compounded by antimicrobial resistance, in particular, resistance to 3rd-generation cephalosporins. This resistance is typically mediated by extended-spectrum beta lactamases (ESBLs). To interrupt ESBL transmission it will be important to investigate how human behaviour, water, sanitation, and hygiene (WASH) practices, environmental contamination, and antibiotic usage in both urban and rural settings interact to contribute to transmission of ESBL E. coli and ESBL K. pneumoniae between humans, animals, and the environment. Here we present the protocol for the Drivers of Resistance in Uganda and Malawi (DRUM) Consortium, in which we will collect demographic, geospatial, clinical, animal husbandry and WASH data from a total of 400 households in Uganda and Malawi. Longitudinal human, animal and environmental sampling at each household will be used to isolate ESBL E. coli and ESBL K. pneumoniae. This will be complimented by a Risks, Attitudes, Norms, Abilities and Self-Regulation (RANAS) survey and structured observations to understand the contextual and psychosocial drivers of regional WASH practices. Bacterial isolates and plate sweeps will be further characterised using a mixture of short-,long-read and metagenomic whole-genome sequencing. These datasets will be integrated into agent-based models to describe the transmission of EBSL resistance in Uganda and Malawi and allow us to inform the design of interventions for interrupting transmission of ESBL-bacteria.
- Published
- 2022
22. Twelve lateral flow immunoassays (LFAs) to detect SARS-CoV-2 antibodies
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Owen, Sophie I., Williams, Christopher T., Garrod, Gala, Fraser, Alice J., Menzies, Stefanie, Baldwin, Lisa, Brown, Lottie, Byrne, Rachel L., Collins, Andrea M., Cubas-Atienzar, Ana I., de Vos, Margaretha, Edwards, Thomas, Escadafal, Camille, Ferreira, Daniela M., Fletcher, Tom, Hyder-Wright, Angela, Kay, Grant A., Kontogianni, Konstantina, Mason, Jenifer, Mitsi, Elena, Planche, Tim, Sacks, Jilian A., Taylor, Joseph, Todd, Stacy, Tully, Caroline, Cuevas, Luis E., Adams, Emily R., Owen, Sophie I., Williams, Christopher T., Garrod, Gala, Fraser, Alice J., Menzies, Stefanie, Baldwin, Lisa, Brown, Lottie, Byrne, Rachel L., Collins, Andrea M., Cubas-Atienzar, Ana I., de Vos, Margaretha, Edwards, Thomas, Escadafal, Camille, Ferreira, Daniela M., Fletcher, Tom, Hyder-Wright, Angela, Kay, Grant A., Kontogianni, Konstantina, Mason, Jenifer, Mitsi, Elena, Planche, Tim, Sacks, Jilian A., Taylor, Joseph, Todd, Stacy, Tully, Caroline, Cuevas, Luis E., and Adams, Emily R.
- Abstract
Background: There are an abundance of commercially available lateral flow assays (LFAs) that detect antibodies to SARS-CoV-2. Whilst these are usually evaluated by the manufacturer, externally performed diagnostic accuracy studies to assess performance are essential. Herein we present an evaluation of 12 LFAs. Methods: Sera from 100 SARS-CoV-2 reverse-transcriptase polymerase chain reaction (RT-PCR) positive participants were recruited through the FASTER study. A total of 105 pre-pandemic sera from participants with other infections were included as negative samples. Results: At presentation sensitivity against RT-PCR ranged from 37.4 to 79% for IgM/IgG, 30.3–74% for IgG, and 21.2–67% for IgM. Sensitivity for IgM/IgG improved ≥ 21 days post symptom onset for 10/12 tests. Specificity ranged from 74.3 to 99.1% for IgM/IgG, 82.9–100% for IgG, and 75.2–98% for IgM. Compared to the EuroImmun IgG enzyme-linked immunosorbent assay (ELISA), sensitivity and specificity ranged from 44.6 to 95.4% and 85.4–100%, respectively. Conclusion: There are many LFAs available with varied sensitivity and specificity. Understanding the diagnostic accuracy of these tests will be vital as we come to rely more on the antibody status of a person moving forward, and as such manufacturer-independent evaluations are crucial.
- Published
- 2022
23. Stakeholder engagement in neonatal clinical trials: an opportunity for mild neonatal encephalopathy research
- Author
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Chalak, Lina, primary, Pilon, Betsy, additional, Byrne, Rachel, additional, and Maitre, Nathalie, additional
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- 2022
- Full Text
- View/download PDF
24. An investigation into the interrelationship between HDL particle composition and anti-atherosclerotic functions inpatients with cardiometabolic disease
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Byrne, Rachel
- Subjects
HDL ,T1DM ,T2DM ,HDL-CEC - Abstract
Diabetes (DM) is one of the fastest growing global health emergencies of the 21st century. People with type 1 diabetes mellitus (T1DM) and people with type 2 diabetes mellitus (T2DM) have an increased risk of cardiovascular disease (CVD), and furthermore, women with T1DM/T2DM have an increased risk relative to men with T1DM/T2DM. High-density lipoprotein particles (HDL-P) exert numerous atheroprotective functions including the ability to promote cholesterol efflux from peripheral cells (cholesterol efflux capacity (CEC)), antioxidant and anti-inflammatory functions. HDL-CEC, the first step of the reverse cholesterol transport pathway, is widely considered the dominant mechanism underpinning the cardioprotective properties of HDL. Small HDL-P (S-HDL-P) facilitate cellular efflux via the ATP-Binding Cassette Subfamily A Member 1 (ABCA1) cholesterol transporter (ABCA1-dependent efflux), while larger HDL-P (L-HDL-P) mediate efflux via ATP-binding cassette subfamily G, member 1 (ABCG1) and Scavenger Receptor Class B Type 1 (SR-B1) pathways (ABCA1-independent efflux). HDL-P carry approximately 250 different proteins known as the HDL proteome. The functions of the proteins associated with HDL align strongly with the assigned functions of the particles indicative that measuring HDL associated proteins may serve as novel biomarkers of HDL function. In this thesis, we hypothesised that the HDL proteome is impacted in T1DM/T2DM resulting in the generation of dysfunctional HDL-P contributing to enhanced CVD risk within these populations. We further hypothesised that the HDL proteome may serve as a surrogate biomarker for HDL-CEC and sought to identify key proteins governing HDL-CEC in people with/without metabolic disease. In Chapter 3, we investigated the relationship between HDL-associated proteins and HDL-CEC, and furthermore developed novel biomarker panels and a scoring algorithm for total CEC, ABCA1-dependent CEC and ABCA1-independent CEC. Our Receiver Operating Characteristic area under the curve was 0.859, P=0.0001 for total efflux score, 0.862, P=0.0001 for ABCA1-dependent efflux score and 0.781, P=0.0002 for ABCA1-independent efflux score, highlighting the ability of the HDL proteome to accurately predict HDL-CEC. In Chapter 4, we investigated the impact of T1DM, T2DM and obesity on HDL efflux capacity, particle size and HDL sub-fraction proteomic composition, to gain greater understanding of the residual CVD risk present in these high-risk populations that is not attributable to traditional risk factors. We found that different proteins are associated with HDL-CEC conditional on T1DM/T2DM status e.g. HDL-associated ApoA-I and ApoA-II lost their association with HDL-CEC in the setting of DM. We also demonstrated that separation of HDL into L-HDL-P and S-HDL-P provided greater insight into the association of HDL proteins with ABCA1-independent and ABCA1-dependent CEC. Lastly, in Chapter 5, we examined sex-specific differences in HDL protein composition and function in people with/without T1DM, T2DM and obesity to gain greater insight into potential mechanisms driving loss of the female 'advantage’ against CVD in DM. We report that women with both T1DM and T2DM are disadvantaged in terms of HDL-CEC relative to male counterparts. We also report sex-specific differences in the proteins governing HDL-CEC in women versus men that may have important implications for their respective CVD risk profile. Indeed, our findings indicate the use of separate biomarkers to predict HDL function in men and women. Our findings have collectively demonstrated that the HDL proteome tightly aligns with HDL-CEC, but proteins governing HDL-CEC differ in those with/without DM, and also differs between men and women. We have further demonstrated that measuring the proteomic composition of L-HDL-P vs. S-HDL-P, and in turn the function of L-HDL-P and S-HDL-P was critical to truly untangle the complex relationship between HDL structure and function. 2022-10-24 JG: Author's signature removed from PDF
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- 2022
25. Drivers of Resistance in Uganda and Malawi (DRUM): a protocol for the evaluation of One-Health drivers of Extended Spectrum Beta Lactamase (ESBL) resistance in Low-Middle Income Countries (LMICs)
- Author
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Cocker, Derek, primary, Sammarro, Melodie, additional, Chidziwisano, Kondwani, additional, Elviss, Nicola, additional, Jacob, Shevin T., additional, Kajumbula, Henry, additional, Mugisha, Lawrence, additional, Musoke, David, additional, Musicha, Patrick, additional, Roberts, Adam P., additional, Rowlingson, Barry, additional, Singer, Andrew C., additional, Byrne, Rachel L., additional, Edwards, Thomas, additional, Lester, Rebecca, additional, Wilson, Catherine N., additional, Hollihead, Beth, additional, Thomson, Nicholas, additional, Jewell, Christopher P., additional, Morse, Tracy, additional, and Feasey, Nicholas A., additional
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- 2022
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26. Saliva Alternative to Upper Respiratory Swabs for SARS-CoV-2 Diagnosis
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Byrne, Rachel L., Kay, Grant A., Kontogianni, Konstantina, Aljayyoussi, Ghaith, Brown, Lottie, Collins, Andrea M., Cuevas, Luis E., Ferreira, Daniela M., Fletcher, Tom, Fraser, Alice J., Garrod, Gala, Hill, Helen, Hughes, Grant L., Menzies, Stefanie, Mitsi, Elena, Owen, Sophie I., Patterson, Edward I., Todd, Stacy, Williams, Christopher T., Hyder-Wright, Angela, Adams, Emily R., and Cubas-Atienzar, Ana I.
- Subjects
Polymerase chain reaction -- Usage ,COVID-19 -- Diagnosis ,Salivary diagnostics -- Methods ,Health - Abstract
Quantitative reverse transcription PCR (qRTPCR) is the diagnostic standard for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease (COVID-19) (1). Testing usually is conducted on [...]
- Published
- 2020
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27. Detection of SARS-CoV-2 infection by saliva and nasopharyngeal sampling in frontline healthcare workers: An observational cohort study.
- Author
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Walker, Naomi F., Byrne, Rachel L., Howard, Ashleigh, Nikolaou, Elissavet, Farrar, Madlen, Glynn, Sharon, Cheliotis, Katerina S., Cubas Atienzar, Ana I., Davies, Kelly, Reiné, Jesús, Rashid-Gardner, Zalina, German, Esther L., Solórzano, Carla, Blandamer, Tess, Hitchins, Lisa, Myerscough, Christopher, Gessner, Bradford D., Begier, Elizabeth, Collins, Andrea M., and Beadsworth, Mike
- Subjects
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MEDICAL personnel , *SALIVA , *SARS-CoV-2 , *COVID-19 pandemic , *COHORT analysis , *SCIENTIFIC observation - Abstract
Background: The SARS-CoV-2 pandemic has caused an unprecedented strain on healthcare systems worldwide, including the United Kingdom National Health Service (NHS). We conducted an observational cohort study of SARS-CoV-2 infection in frontline healthcare workers (HCW) working in an acute NHS Trust during the first wave of the pandemic, to answer emerging questions surrounding SARS-CoV-2 infection, diagnosis, transmission and control. Methods: Using self-collected weekly saliva and twice weekly combined oropharyngeal/nasopharyngeal (OP/NP) samples, in addition to self-assessed symptom profiles and isolation behaviours, we retrospectively compared SARS-CoV-2 detection by RT-qPCR of saliva and OP/NP samples. We report the association with contemporaneous symptoms and isolation behaviour. Results: Over a 12-week period from 30th March 2020, 40·0% (n = 34/85, 95% confidence interval 31·3–51·8%) HCW had evidence of SARS-CoV-2 infection by surveillance OP/NP swab and/or saliva sample. Symptoms were reported by 47·1% (n = 40) and self-isolation by 25·9% (n = 22) participants. Only 44.1% (n = 15/34) participants with SARS-CoV-2 infection reported any symptoms within 14 days of a positive result and only 29·4% (n = 10/34) reported self-isolation periods. Overall agreement between paired saliva and OP/NP swabs was 93·4% (n = 211/226 pairs) but rates of positive concordance were low. In paired samples with at least one positive result, 35·0% (n = 7/20) were positive exclusively by OP/NP swab, 40·0% (n = 8/20) exclusively by saliva and in only 25·0% (n = 5/20) were the OP/NP and saliva result both positive. Conclusions: HCW are a potential source of SARS-CoV-2 transmission in hospitals and symptom screening will identify the minority of infections. Without routine asymptomatic SARS-CoV-2 screening, it is likely that HCW with SARS-CoV-2 infection would continue to attend work. Saliva, in addition to OP/NP swab testing, facilitated ascertainment of symptomatic and asymptomatic SARS-CoV-2 infections. Combined saliva and OP/NP swab sampling would improve detection of SARS-CoV-2 for surveillance and is recommended for a high sensitivity strategy. [ABSTRACT FROM AUTHOR]
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- 2023
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28. Investigation of SARS-CoV-2 faecal shedding in the community: a prospective household cohort study (COVID-LIV) in the UK
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Vaselli, Natasha Marcella, Setiabudi, Wega, Subramaniam, Krishanthi, Adams, Emily, Turtle, Lance, Iturriza-Gómara, Miren, Solomon, Tom, Cunliffe, Nigel A., French, Neil, Hungerford, Daniel, Vivancos, Roberto, Gabbay, Mark, Buchan, Iain, Carrol, Enitan D., Gamble, Carrol, Crossley, Lynnette, Joseph, Neil, Wilton, Moon, Troughton, Lee D., Kilada, Samantha, Abba, Katharine, Simpson, Victoria, Tulloch, John S. P., Goodwin, Lynsey, Daws, Rachael, Forootan, Shiva Seyed, Dobson, Susan, Press, Rachel, Spaine, Vida, Hands, Lesley, Bradfield, Kate, McNally, Carol, Moitt, Tracy, Balabanova, Silviya, Donohue, Chloe, Finnetty, Lynsey, Marsh, Laura, Greenhalf, William, Naisbitt, Dean J., Shaw, Victoria E., Aston, Stephen, Platt, Gareth, Dunn, Christopher, Thomson, Paul J., Ogese, Monday, Hammond, Sean, Adair, Kareena, Farrell, Liam, Gardner, Joshua, Jaruthamsophon, Kanoot, Ali, Serat-E, Lister, Adam, Booth, Laura, Ashworth, Milton, Bullock, Katie, Catterall, Benjamin W. A., Foster, Terry, Lavelle-Langham, Lara, Middleton, Joanna, Reynolds, William, Cass, Emily, Carracedo, Alejandra Doce, Davies, Lianne, Flaherty, Lisa, Oates, Melanie, Maziere, Nicole, Lloyd, Jennifer, Jones, Christopher, Massey, Hannah, Holmes, Anthony, Carlucci, Nicola, Brammah, Vanessa, Ramos, Yasmyn, Allen, Daniel, Armstrong, Jane, Howarth, Debbie, Wilcock, Eve, Lowe, Jenna, Jones, Jayne, Wright, Paula, Slack, Iain, McLaughlin, Simone, Mason, Jessica, Edwards, Thomas, McKeown, Claudia, Hendrick, Elysse, Williams, Chris, Byrne, Rachel, Buist, Kate, Garrod, Gala, Owen, Sophie, Jones, Ashley P., and Gkioni, Efstathia
- Subjects
body regions ,wa_4 ,wc_20 ,viruses ,fungi ,wc_505 ,qw_160 ,skin and connective tissue diseases ,respiratory tract diseases - Abstract
Background\ud SARS-CoV-2 is frequently shed in the stool of patients hospitalised with COVID-19. The extent of faecal shedding of SARS-CoV-2 among individuals in the community, and its potential to contribute to spread of disease, is unknown.\ud \ud Methods\ud In this prospective, observational cohort study among households in Liverpool, UK, participants underwent weekly nasal/throat swabbing to detect SARS-CoV-2 virus, over a 12-week period from enrolment starting July 2020. Participants that tested positive for SARS-CoV-2 were asked to provide a stool sample three and 14 days later. In addition, in October and November 2020, during a period of high community transmission, stool sampling was undertaken to determine the prevalence of SARS-CoV-2 faecal shedding among all study participants. SARS-CoV-2 RNA was detected using Real-Time PCR.\ud \ud Results\ud A total of 434 participants from 176 households were enrolled. Eighteen participants (4.2%: 95% confidence interval [CI] 2.5–6.5%) tested positive for SARS-CoV-2 virus on nasal/throat swabs and of these, 3/17 (18%: 95% CI 4–43%) had SARS-CoV-2 detected in stool. Two of three participants demonstrated ongoing faecal shedding of SARS-CoV-2, without gastrointestinal symptoms, after testing negative for SARS-CoV-2 in respiratory samples. Among 165/434 participants without SARS-CoV-2 infection and who took part in the prevalence study, none had SARS-CoV-2 in stool. There was no demonstrable household transmission of SARS-CoV-2 among households containing a participant with faecal shedding.\ud \ud Conclusions\ud Faecal shedding of SARS-CoV-2 occurred among community participants with confirmed SARS-CoV-2 infection. However, during a period of high community transmission, faecal shedding of SARS-CoV-2 was not detected among participants without SARS-CoV-2 infection. It is unlikely that the faecal-oral route plays a significant role in household and community transmission of SARS-CoV-2.
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- 2021
29. Accuracy of the Mologic COVID-19 rapid antigen test: a prospective multi-centre analytical and clinical evaluation
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CubasAtienzar, Ana, Bell, Fiona, Byrne, Rachel, Buist, Kate, Clark, David J., Cocozza, Michael, Collins, Andrea, Cuevas, Luis, Duvoix, Annelyse, Easom, Nicholas, Edwards, Thomas, Ferreira, Daniela, Fletcher, Tom, Groppelli, Elisabetta, Hyder-Wright, Angela, Kadamus, Ewelina, Kirwan, Daniela E., Kontogianni, Konstantina, Krishna, Sanjeev, Kluczna, Diana, Mark, Julian, Mensah-Kane, Josephine, Miller, Elisha, Mitsi, Elena, Norton, Donna, O'Connor, Emma, Owen, Sophie, Planche, Tim, Shelley, Samuel, Staines, Henry M., Tate, David, Thompson, Caitlin, Walker, Gemma, Williams, Chris, Wooding, Dominic, Fitchett, Joseph R. A., and Adams, Emily
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qy_4 ,wc_506 - Abstract
Background: The coronavirus disease 2019 (COVID-19) pandemic has highlighted the reliance on antigen detection rapid diagnostic tests (Ag-RDTs). Their evaluation at point of use is a priority.\ud \ud Methods: Here, we report a multi-centre evaluation of the analytical sensitivity, specificity, and clinical accuracy of the Mologic COVID-19 Ag-RDT by comparing to reverse transcriptase polymerase chain reaction (RT-qPCR) results from individuals with and without COVID-19 symptoms. Participants had attended hospitals in Merseyside, hospital and ambulance services in Yorkshire, and drive-through testing facilities in Northumberland, UK.\ud \ud Results: The limit of detection of the Mologic COVID-19 Ag-RDT was 5.0 x 102 pfu/ml in swab matrix with no cross-reactivity and interference for any other pathogens tested. A total of 347 participants were enrolled from 26th of November 2020 to 15th of February 2021 with 39.2% (CI 34.0-44.6) testing RT-qPCR positive for SARS-CoV-2. The overall sensitivity and specificity of the Mologic Ag-RDT compared to the reference SARS-CoV-2 RT-qPCR were 85.0% (95% CI 78.3-90.2) and 97.8% (95.0-99.3), respectively. Sensitivity was stratified by RT-qPCR cycle threshold (Ct) and 98.4% (91.3-100) of samples with a Ct less than 20 and 93.2% (86.5-97.2) of samples with a Ct less than 25 were detected using the Ag-RDT. Clinical accuracy was stratified by sampling strategy, swab type and clinical presentation. Mologic COVID-19 Ag-RDT demonstrated highest sensitivity with nose/throat swabs compared with throat or nose swabs alone; however, the differences were not statistically significant.\ud \ud Conclusions: Overall, the Mologic test had high diagnostic accuracy across multiple different settings, different demographics, and on self-collected swab specimens. These findings suggest the Mologic rapid antigen test may be deployed effectively across a range of use settings.
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- 2021
30. Breast Health Experiences in Women with Cerebral Palsy: A Qualitative Approach
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Ehrlich-Jones, Linda, primary, Durkin, Jordyn, additional, Byrne, Rachel, additional, Todd, Allison, additional, Reis, Judith Panko, additional, Wolfman, Judith, additional, Gaebler-Spira, Deborah, additional, and Marciniak, Christina, additional
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- 2021
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31. Comparative evaluation of ten lateral flow immunoassays to detect SARS-CoV-2 antibodies
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Garrod, Gala, Owen, Sophie, Baillie, J. Kenneth, Baldwin, Lisa, Brown, Lottie, Byrne, Rachel, CubasAtienzar, Ana, Cuevas, Luis, Fraser, Alice, Fletcher, Tom, Goodwin, Lynsey, Kay, Grant Alistair, Kontogianni, Konstantina, Mason, Jenifer, Openshaw, Peter J.M., Menzies, Stefanie, Moore, Shona C., Semple, Malcolm G., Taylor, Joseph, Turtle, Lance C.W., Williams, Chris, and Adams, Emily
- Subjects
qw_520 ,wa_105 ,wc_20 ,qw_573 ,wc_505 ,qw_160 - Abstract
Background: Rapid mobilisation from industry and academia\ud following the outbreak of the novel coronavirus, severe acute\ud respiratory syndrome coronavirus 2 (SARS-CoV-2), led to the\ud development and availability of SARS-CoV-2 lateral flow\ud immunoassays (LFAs). High quality LFAs are urgently needed at the\ud point of care to add to currently available diagnostic tools. In this\ud study, we provide evaluation data for ten LFAs suitable for use at the\ud point of care.\ud Methods: COVID-19 positive patients (N=45), confirmed by reverse\ud transcription – quantitative polymerase chain reaction (RT-qPCR), were\ud recruited through the International Severe Acute Respiratory and\ud Emerging Infection Consortium - Coronavirus Clinical Characterisation\ud Consortium (ISARIC4C) study. Sera collected from patients with\ud influenza A (N=20), tuberculosis (N=5), individuals with previous\ud flavivirus exposure (N=21), and healthy sera (N=4), collected preOpen Peer Review\ud Reviewer Status AWAITING PEER REVIEW\ud Any reports and responses or comments on the\ud article can be found at the end of the article.\ud Page 1 of 9\ud Wellcome Open Research 2021, 6:18 Last updated: 01 FEB 2021\ud pandemic, were used as negative controls. Ten LFAs manufactured or\ud distributed by ASBT Holdings Ltd, Cellex, Fortress Diagnostics,\ud Nantong Egens Biotechnology, Mologic, NG Biotech, Nal von Minden\ud and Suzhou Herui BioMed Co. were evaluated.\ud Results: Compared to RT-qPCR, sensitivity of LFAs ranged from 87.0-\ud 95.7%. Specificity against pre-pandemic controls ranged between\ud 92.0-100%. Compared to IgG ELISA, sensitivity and specificity ranged\ud between 90.5-100% and 93.2-100%, respectively. Percentage\ud agreement between LFAs and IgG ELISA ranged from 89.6-92.7%.\ud Inter-test agreement between LFAs and IgG ELISA ranged between\ud kappa=0.792-0.854.\ud Conclusions: LFAs may serve as a useful tool for rapid confirmation of\ud ongoing or previous infection in conjunction with clinical suspicion of\ud COVID-19 in patients attending hospital. Impartial validation prior to\ud commercial sale provides users with data that can inform best use
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- 2021
32. IgG Seroconversion and Pathophysiology in Severe Acute Respiratory Syndrome Coronavirus 2 Infection
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Staines, Henry M, Kirwan, Daniela E, Clark, David J, Adams, Emily, Augustin, Yolanda, Byrne, Rachel, Cocozza, Michael, CubasAtienzar, Ana, Cuevas, Luis, Cusinato, Martina, Davies, Benedict M O, Davis, Mark, Davis, Paul, Duvoix, Annelyse, Eckersley, Nicholas M, Forton, Daniel, Fraser, Alice, Garrod, Gala, Hadcocks, Linda, Hu, Qinxue, Johnson, Michael, Kay, Grant Alistair, Klekotko, Kesja, Lewis, Zawditu, Mensah-Kane, Josephine, Menzies, Stefanie, Monahan, Irene, Moore, Catherine, Nebe-von-Caron, Gerhard, Owen, Sophie, Sainter, Chris, Sall, Amadou A, Schouten, James, Williams, Chris, Wilkins, John, Woolston, Kevin, Fitchett, Joseph R A, Krishna, Sanjeev, and Planche, Tim
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qw_575 ,wa_105 ,wc_518 ,fungi ,wc_505 ,wc_500 - Abstract
We investigated the dynamics of seroconversion in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. During March 29–May 22, 2020, we collected serum samples and associated clinical data from 177 persons in London, UK, who had SARS-CoV-2 infection. We measured IgG against SARS-CoV-2 and compared antibody levels with patient outcomes, demographic information, and laboratory characteristics. We found that 2.0%–8.5% of persons did not seroconvert 3–6 weeks after infection. Persons who seroconverted were older, were more likely to have concurrent conditions, and had higher levels of inflammatory markers. Non-White persons had higher antibody concentrations than those who identified as White; these concentrations did not decline during follow-up. Serologic assay results correlated with disease outcome, race, and other risk factors for severe SARS-CoV-2 infection. Serologic assays can be used in surveillance to clarify the duration and protective nature of humoral responses to SARS-CoV-2 infection.
- Published
- 2021
33. Accuracy of the Mologic COVID-19 rapid antigen test: a prospective multi-centre analytical and clinical evaluation
- Author
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Cubas-Atienzar, Ana I, primary, Bell, Fiona, additional, Byrne, Rachel L., additional, Buist, Kate, additional, Clark, David J., additional, Cocozza, Michael, additional, Collins, Andrea M., additional, Cuevas, Luis E., additional, Duvoix, Annelyse, additional, Easom, Nicholas, additional, Edwards, Thomas, additional, Ferreira, Daniella M., additional, Fletcher, Tom, additional, Groppelli, Elisabetta, additional, Hyder-Wright, Angela, additional, Kadamus, Ewelina, additional, Kirwan, Daniela E., additional, Kontogianni, Konstantina, additional, Krishna, Sanjeev, additional, Kluczna, Diana, additional, Mark, Julian, additional, Mensah-Kane, Josephine, additional, Miller, Elisha, additional, Mitsi, Elena, additional, Norton, Donna, additional, O'Connor, Emma, additional, Owen, Sophie I., additional, Planche, Tim, additional, Shelley, Samuel, additional, Staines, Henry M., additional, Tate, David, additional, Thompson, Caitlin R., additional, Walker, Gemma, additional, Williams, Christopher T., additional, Wooding, Dominic, additional, Fitchett, Joseph R. A., additional, and Adams, Emily R., additional
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- 2021
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34. High SARS-CoV-2 seroprevalence in health care workers but relatively low numbers of deaths in urban Malawi
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Chibwana, Marah G., primary, Jere, Khuzwayo C., additional, Kamng'ona, Raphael, additional, Mandolo, Jonathan, additional, Katunga-Phiri, Vincent, additional, Tembo, Dumizulu, additional, Mitole, Ndaona, additional, Musasa, Samantha, additional, Sichone, Simon, additional, Lakudzala, Agness, additional, Sibale, Lusako, additional, Matambo, Prisca, additional, Kadwala, Innocent, additional, Byrne, Rachel L., additional, Mbewe, Alice, additional, Henrion, Marc Y. R., additional, Morton, Ben, additional, Phiri, Chimota, additional, Mallewa, Jane, additional, Mwandumba, Henry C., additional, Adams, Emily R., additional, Gordon, Stephen B., additional, and Jambo, Kondwani C., additional
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- 2020
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35. HDL particle size is increased and HDL-cholesterol efflux is enhanced in type 1 diabetes: a cross-sectional study
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Ahmed, Mohamad O., primary, Byrne, Rachel E., additional, Pazderska, Agnieszka, additional, Segurado, Ricardo, additional, Guo, Weili, additional, Gunness, Anjuli, additional, Frizelle, Isolda, additional, Sherlock, Mark, additional, Ahmed, Khalid S., additional, McGowan, Anne, additional, Moore, Kevin, additional, Boran, Gerard, additional, McGillicuddy, Fiona C., additional, and Gibney, James, additional
- Published
- 2020
- Full Text
- View/download PDF
36. Co‐creation: Pioneering progress in cerebral palsy research.
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Byrne, Rachel and Metherall, Bronya
- Subjects
- *
CEREBRAL palsy , *HIV infection transmission - Abstract
The article discusses the importance of co-creation in advancing research and care for individuals living with cerebral palsy (CP). It emphasizes the value of collective input, creativity, and shared expertise in achieving transformative change. The article also highlights the establishment of CP360, a global coalition that aims to revolutionize the landscape for individuals with CP through knowledge-sharing and strategic influence. The article emphasizes the need for a comprehensive and integrated approach to address the multifaceted challenges of CP, particularly in low- and middle-income countries. It concludes by stating that co-creation is the future and the only way forward in addressing the world's most pressing problems. [Extracted from the article]
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- 2024
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37. Contextualizing disability: a cross-sectional analysis of the association between the built environment and functioning among people living with spinal cord injury in the United States
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Botticello, Amanda L., primary, Tulsky, David, additional, Heinemann, Allen, additional, Charlifue, Susan, additional, Kalpakjian, Claire, additional, Slavin, Mary, additional, Byrne, Rachel, additional, and Rohrbach, Tanya, additional
- Published
- 2018
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38. Chromosome Studies in Preleukemia
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ROWLEY, JANET D., BLAISDELL, RICHARD K., JACOBSON, LEON O., Mikuta, Judith, Byrne, Rachel, and Shepley, Lona
- Abstract
Three patients with different obscure hematologic disorders are presented. All 3 patients had abnormalities of chromosome number confined to marrow cells. Case 1 is a 23-year-old man with aplastic anemia; most of his bone marrow cells contained 45 chromosomes, with one missing from group C. Case 2 is a 62-year-old man who died of idiopathic sideroachrestic anemia; most of his bone marrow cells contained 47 chromosomes with an extra C group chromosome which appeared to be an autosome. Case 3 is a 59-year-old woman with idiopathic thrombocythemia; while the majority of her bone marrow cells contained 46 chromosomes, a stable minority cell line had 48 chromosomes. Although many of the reported patients with myelodysplastic-myeloproliferative disorders have normal chromosomes, 5 cases with some chromosomal aberration, previously reported by others, are summarized. None of these patients had clinical evidence of leukemia. In 4 of the patients, the chromosomal anomaly involved a chromosome in group C, which is the group in which aneuploidy occurred in all 3 of our patients. It is postulated that a stable, aneuploid stem line does not of itself produce neoplasia, but rather that this alteration of the genome may provide a more favorable milieu for the action of some transforming agent. Because of the frequent occurrence of C group abnormalities in these cases of marrow disorders, it is further postulated that genes on one or more C chromosomes might be responsible for homeostatic control of hemopoiesis, and that a change in genetic balance involving a C group chromosome(s) coupled with a transforming agent might result in leukemia in a greater proportion of individuals than aneuploidy of some other chromosomal group.
- Published
- 1966
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39. Optimization of SARS-CoV-2 culture from clinical samples for clinical trial applications.
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Wooding D, Buist K, Romero-Ramirez A, Savage H, Watkins R, Bengey D, Greenland-Bews C, Thompson CR, Kontogianni N, Body R, Hayward G, Byrne RL, Gould S, Myerscough C, Atkinson B, Shaw V, Greenhalf B, Adams E, Cubas-Atienzar A, Khoo S, Fletcher T, and Edwards T
- Abstract
Clinical trials of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) therapeutics often include virological secondary endpoints to compare viral clearance and viral load reduction between treatment and placebo arms. This is typically achieved using quantitative reverse-transcriptase PCR (RT-qPCR), which cannot differentiate replicant competent virus from non-viable virus or free RNA, limiting its utility as an endpoint. Culture-based methods for SARS-CoV-2 exist; however, these are often insensitive and poorly standardized for use as clinical trial endpoints. We report optimization of a culture-based approach evaluating three cell lines, three detection methods, and key culture parameters. We show that Vero-angiotensin-converting enzyme 2-transmembrane serine protease 2 cells in combination with RT-qPCR of culture supernatants from the first passage provides the greatest overall detection of Delta viral replication (22 of 32, 68.8%), being able to identify viable virus in 83.3% (20 of 24) of clinical samples with initial Ct values of <30. Likewise, we demonstrate that RT-qPCR using culture supernatants from the first passage of Vero human signaling lymphocytic activation molecule cells provides the highest overall detection of Omicron viral replication (9 of 31, 29%), detecting live virus in 39.1% (9 of 23) of clinical samples with initial Ct values of <25. This assessment demonstrates that combining RT-qPCR with virological endpoint analysis has utility in clinical trials of therapeutics for SARS-CoV-2; however, techniques may require optimization based on dominant circulating strain., Importance: RT-qPCR is commonly used for virological endpoints during clinical trials for antiviral therapy to determine the quantity and presence of virus in a sample. However, RT-qPCR identifies viral RNA and cannot determine if viable virus is present. Existing culture-based techniques for SARS-CoV-2 are insensitive and not sufficiently standardized to be employed as clinical study endpoints. The use of a culture system to monitor replicating viruses could mitigate the possibility of molecular techniques identifying viral RNA from inactive or lysed viral particles. The methodology optimized in this study for detecting infectious viruses may have application as a secondary virological endpoint in clinical trials of therapeutics for SARS-CoV-2 in addition to numerous research processes.
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- 2024
- Full Text
- View/download PDF
40. Multicenter Diagnostic Evaluation of OnSite COVID-19 Rapid Test (CTK Biotech) among Symptomatic Individuals in Brazil and the United Kingdom.
- Author
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Thompson CR, Torres PM, Kontogianni K, Byrne RL, Noguera SV, Luna-Muschi A, Marchi AP, Andrade PS, Dos Santos Barboza A, Nishikawara M, Body R, de Vos M, Escadafal C, Adams E, Figueiredo Costa S, and Cubas-Atienzar AI
- Subjects
- Humans, Brazil, Pandemics, Prospective Studies, SARS-CoV-2, United Kingdom, Biotechnology, COVID-19 Testing, COVID-19 diagnosis
- Abstract
The COVID-19 pandemic has given rise to numerous commercially available antigen rapid diagnostic tests (Ag-RDTs). To generate and to share accurate and independent data with the global community requires multisite prospective diagnostic evaluations of Ag-RDTs. This report describes the clinical evaluation of the OnSite COVID-19 rapid test (CTK Biotech, CA, USA) in Brazil and the United Kingdom. A total of 496 paired nasopharyngeal (NP) swabs were collected from symptomatic health care workers at Hospital das Clínicas in São Paulo, Brazil, and 211 NP swabs were collected from symptomatic participants at a COVID-19 drive-through testing site in Liverpool, United Kingdom. Swabs were analyzed by Ag-RDT, and results were compared to quantitative reverse transcriptase PCR (RT-qPCR). The clinical sensitivity of the OnSite COVID-19 rapid test in Brazil was 90.3% (95% confidence interval [CI], 75.1 to 96.7%) and in the United Kingdom was 75.3% (95% CI, 64.6 to 83.6%). The clinical specificity in Brazil was 99.4% (95% CI, 98.1 to 99.8%) and in the United Kingdom was 95.5% (95% CI, 90.6 to 97.9%). Concurrently, analytical evaluation of the Ag-RDT was assessed using direct culture supernatant of SARS-CoV-2 strains from wild-type (WT), Alpha, Delta, Gamma, and Omicron lineages. This study provides comparative performance of an Ag-RDT across two different settings, geographical areas, and populations. Overall, the OnSite Ag-RDT demonstrated a lower clinical sensitivity than claimed by the manufacturer. The sensitivity and specificity from the Brazil study fulfilled the performance criteria determined by the World Health Organization, but the performance obtained from the UK study failed to do. Further evaluation of Ag-RDTs should include harmonized protocols between laboratories to facilitate comparison between settings. IMPORTANCE Evaluating rapid diagnostic tests in diverse populations is essential to improving diagnostic responses as it gives an indication of the accuracy in real-world scenarios. In the case of rapid diagnostic testing within this pandemic, lateral flow tests that meet the minimum requirements for sensitivity and specificity can play a key role in increasing testing capacity, allowing timely clinical management of those infected, and protecting health care systems. This is particularly valuable in settings where access to the test gold standard is often restricted., Competing Interests: The authors declare a conflict of interest. E.A. is an employee of Mologic. C.E. and M.D.V. are employees of FIND. E.A., C.E., and M.D.V. had no role in data collection and analysis. The other authors have no conflicts to declare.
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- 2023
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41. Multicenter Diagnostic Evaluation of a Novel Coronavirus Antigen Lateral Flow Test among Symptomatic Individuals in Brazil and the United Kingdom.
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Faffe DS, Byrne RL, Body R, Castiñeiras TMP, Castiñeiras AP, Finch LS, Kontogianni K, Bengey D, Galliez RM, Ferreira OC Jr, Mariani D, da Silva BO, Ribeiro SS, de Vos M, Escadafal C, Adams ER, Tanuri A, and Cubas Atienzar AI
- Subjects
- Humans, Brazil, Pandemics, United Kingdom, Gold Colloid, SARS-CoV-2 genetics, COVID-19 diagnosis
- Abstract
The COVID-19 pandemic has led to the commercialization of many antigen-based rapid diagnostic tests (Ag-RDTs), requiring independent evaluations. This report describes the clinical evaluation of the Novel Coronavirus 2019-nCoV Antigen Test (Colloidal Gold) (Beijing Hotgen Biotech Co., Ltd.), at two sites within Brazil and one in the United Kingdom. The collected samples (446 nasal swabs from Brazil and 246 nasopharyngeal samples from the UK) were analyzed by the Ag-RDT and compared to reverse transcription-quantitative PCR (RT-qPCR). Analytical evaluation of the Ag-RDT was performed using direct culture supernatants of SARS-CoV-2 strains from the wild-type (B.1), Alpha (B.1.1.7), Delta (B.1.617.2), Gamma (P.1), and Omicron (B.1.1.529) lineages. An overall sensitivity and specificity of 88.2% (95% confidence interval [CI], 81.3 to 93.3) and 100.0% (95% CI, 99.1 to 100.0), respectively, were obtained for the Brazilian and UK cohorts. The analytical limit of detection was determined as 1.0 × 10
3 PFU/mL (Alpha), 2.5 × 102 PFU/mL (Delta), 2.5 × 103 PFU/mL (Gamma), and 1.0 × 103 PFU/mL (Omicron), giving a viral copy equivalent of approximately 2.1 × 104 copies/mL, 9.0 × 105 copies/mL, 1.7 × 106 copies/mL, and 1.8 × 105 copies/mL for the Ag-RDT, respectively. Overall, while a higher sensitivity was claimed by the manufacturers than that found in this study, this evaluation finds that the Ag-RDT meets the WHO minimum performance requirements for sensitivity and specificity of COVID-19 Ag-RDTs. This study illustrates the comparative performance of the Hotgen Ag-RDT across two global settings and considers the different approaches in evaluation methods. IMPORTANCE Since the beginning of the SARS-CoV-2 pandemic, we have witnessed growing numbers of antigen rapid diagnostic tests (Ag-RDTs) being brought to market. In the United Kingdom, this was somewhat controlled indirectly as the government offered free tests from a small number of companies. However, as this has now ceased, individuals are responsible for their own acquisition of test kits. Similarly in Brazil, as of January 2022, pharmacies and other health care retailers are permitted to sell Ag-RDTs directly to the community. Many of these Ag-RDTs have not been externally evaluated, and results are not readily available to the public. Thus, there is now a need for a transparent evaluation of Ag-RDTs with both analytical and clinical evaluation. We present an independent review of the Novel Coronavirus 2019-nCoV Antigen Test (Colloidal Gold) (Beijing Hotgen Biotech Co., Ltd.), at two sites within Brazil and one in the United Kingdom.- Published
- 2022
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42. IgG Seroconversion and Pathophysiology in Severe Acute Respiratory Syndrome Coronavirus 2 Infection.
- Author
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Staines HM, Kirwan DE, Clark DJ, Adams ER, Augustin Y, Byrne RL, Cocozza M, Cubas-Atienzar AI, Cuevas LE, Cusinato M, Davies BMO, Davis M, Davis P, Duvoix A, Eckersley NM, Forton D, Fraser AJ, Garrod G, Hadcocks L, Hu Q, Johnson M, Kay GA, Klekotko K, Lewis Z, Macallan DC, Mensah-Kane J, Menzies S, Monahan I, Moore CM, Nebe-von-Caron G, Owen SI, Sainter C, Sall AA, Schouten J, Williams CT, Wilkins J, Woolston K, Fitchett JRA, Krishna S, and Planche T
- Subjects
- Adult, Aged, Antibodies, Viral blood, COVID-19 physiopathology, Enzyme-Linked Immunosorbent Assay, Female, Humans, Male, Middle Aged, Reverse Transcriptase Polymerase Chain Reaction, COVID-19 blood, COVID-19 immunology, Immunoglobulin G blood, SARS-CoV-2, Seroconversion
- Abstract
We investigated the dynamics of seroconversion in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. During March 29-May 22, 2020, we collected serum samples and associated clinical data from 177 persons in London, UK, who had SARS-CoV-2 infection. We measured IgG against SARS-CoV-2 and compared antibody levels with patient outcomes, demographic information, and laboratory characteristics. We found that 2.0%-8.5% of persons did not seroconvert 3-6 weeks after infection. Persons who seroconverted were older, were more likely to have concurrent conditions, and had higher levels of inflammatory markers. Non-White persons had higher antibody concentrations than those who identified as White; these concentrations did not decline during follow-up. Serologic assay results correlated with disease outcome, race, and other risk factors for severe SARS-CoV-2 infection. Serologic assays can be used in surveillance to clarify the duration and protective nature of humoral responses to SARS-CoV-2 infection.
- Published
- 2021
- Full Text
- View/download PDF
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