19 results on '"E. Njuguna"'
Search Results
2. Examining the Gender Productivity Gap among Farm Households in Mali
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R Tabo, J O Yila, K Sissoko, E Njuguna-Mungai, and A Singbo
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Economics and Econometrics ,Poverty ,Endowment ,business.industry ,Development ,Agriculture ,Economics ,Demographic economics ,Rural area ,Agricultural productivity ,business ,Productivity ,Socioeconomic status ,Endowment effect - Abstract
This paper decomposes the gender agricultural productivity gap and measures the factors that influence the gap between male and female agricultural plot managers in Mali. The Oaxaca–Blinder approach and the recentred influence function (RIF) decomposition methodology are applied to a nationally representative survey of Mali. The results show that the agricultural productivity of female plot managers is 20.18% lower than that of male plot managers. Additionally, while more than half (56%) of the agricultural productivity gap is influenced by female-specific structural disadvantages, 44% of the gap is due to an endowment effect. Socio-economic characteristics such as the educational level and age of the plot manager, environmental factors and agricultural production practices, i.e., the differential use of inputs (organic or inorganic fertiliser and improved seeds) and the use of hired female workers seem to affect the female-specific structural disadvantages. To reduce or close the gender productivity gap, the underlying causes of female-specific structural disadvantages must be addressed to enable female farmers to obtain the same returns as men. Traditional means of addressing the gender gap, such as providing education for women in rural areas and facilitating rural women’ access to extension services and improved seeds, can mitigate the endowment deficit. This paper highlights the need to develop a better understanding of the factors influencing the structural disadvantages faced by female farmers in Mali that could feed into the development of more effective policies to address the gender gap in agricultural productivity, improving productivity and gender equity and reducing poverty.
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- 2020
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3. Modelling the Distributions of Maize Stem Borers at Local Scale in East African Mountain Gradients Using Climatic and Edaphic Variables
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M. Gathara, Odanga J. James, Estomih S. Massawe, Tobias Landmann, E. Njuguna, Sizah Mwalusepo, Elfatih M. Abdel-Rahman, B.P. Le Ru, Tino Johansson, and Paul-André Calatayud
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0106 biological sciences ,2. Zero hunger ,Busseola fusca ,biology ,Species distribution ,Edaphic ,15. Life on land ,biology.organism_classification ,Chilo ,010603 evolutionary biology ,01 natural sciences ,Lepidoptera genitalia ,010602 entomology ,Agronomy ,Crambidae ,13. Climate action ,Insect Science ,Noctuidae ,Relative humidity ,Agronomy and Crop Science ,Ecology, Evolution, Behavior and Systematics - Abstract
Lepidopteran stem borers are among the most important pests of maize in East Africa. Understanding the factors that influence maize stem borers' distribution is crucial in predicting their response to future climate change. The hypothesis of this study was that the potential distribution of the maize stem borers Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) and Busseola fusca (Fuller) (Lepidoptera: Noctuidae) at small scale along altitudinal gradients at Mount Kilimanjaro and Taita Hills in Tanzania and Kenya, respectively, depends on other climatic and edaphic factors besides temperature. The species distribution was studied using the maximum entropy (Maxent) application with three climatic (temperature, rainfall and relative humidity) and five soil variables [soil silicon (Si), potassium (K), phosphorus (P), nitrogen (N) concentrations and water-holding capacity (WHc)]. The model accuracy was evaluated using area under the curve (AUC) values based on 25%independent test data set. The results revealed that in addition to temperature, rainfall, and relative humidity, soil characteristics were affecting the geographical distribution of C. partellus and B. fusca at both the Mount Kilimanjaro and Taita Hills study sites. The relative importance of all studied variables varied between the two study sites. At Mount Kilimanjaro, WHc exhibited the greatest influence on C. partellus distribution while at Taita Hills it was relative humidity. For B. fusca distribution, the temperature was found more crucial at both Mount Kilimanjaro and Taita Hills.
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- 2018
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4. Silica in insect-plant interactions
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Gerald Juma, P. A. Calatayud, and E. Njuguna
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Computer science ,Data science - Published
- 2016
5. Can climate-driven change influence silicon assimilation by cereals and hence the distribution of lepidopteran stem borers in East Africa?
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E. Njuguna, Gerphas O. Okuku, David Williamson, George Ong’amo, A. Kibe, B. Le Ru, Paul-André Calatayud, Gerald Juma, Boaz K. Musyoka, Sizah Mwalusepo, Erastus Gatebe, Sevgan Subramanian, Tino Johansson, M. Gathara, International Centre of Insect Physiology and Ecology (ICIPE), ICIPE, Kenya Forestry Research Institute (KEFRI), Biogéochimie-Traceurs-Paléoclimat (BTP), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), World Agroforestry Center [CGIAR, Kenya] (ICRAF), Consultative Group on International Agricultural Research [CGIAR] (CGIAR), Laboratoire Evolution, Génomes et Spéciation [Gif-sur-Yvette] (LEGS), Institut de recherche pour le développement [IRD] : UR072-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636))
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0106 biological sciences ,Silicon ,Busseola fusca ,Climate change ,[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] ,Chilo ,01 natural sciences ,Altitude ,Chilo partellus ,East africa ,ComputingMilieux_MISCELLANEOUS ,2. Zero hunger ,Herbivore ,Ecology ,biology ,Temperature ,Assimilation (biology) ,Staple food ,15. Life on land ,biology.organism_classification ,Lepidopteran stem borers ,Maize ,010602 entomology ,Agronomy ,13. Climate action ,Animal Science and Zoology ,Agronomy and Crop Science ,Eastern Afromontane ,010606 plant biology & botany - Abstract
In East Africa, lepidopteran stemborers such as Chilo partellus and Busseola fusca are major constraints to production of maize, which is the main staple food crop in the region. Cereals depend on silicon (Si)-based defences to fight off herbivores. Using altitudinal ranges in the East African highlands as ecological surrogates for inferring climate change, it was shown that Si concentrations in soil and maize decreased with altitude. This was attributed, in part, to low temperatures at high altitudes, which negatively affected Si assimilation by maize. Experiments showed that B. fusca was more susceptible to Si than C. partellus . Hence the predominance of B. fusca in the highlands and of C. partellus in the lowlands could be partly explained by altitudinal differences in Si concentrations in maize plants. Therefore, a rise in temperature due to climate change should enhance the plants’ Si assimilation and as a result C. partellus might move into the higher altitudes and increasingly displace B. fusca .
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- 2016
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6. Factors influencing cervical cancer screening in a Kenyan Health Facility: a mixed qualitative and quantitative study
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E. Njuguna, K. Mutai, John Kinuthia, S. Ilovi, Peter Njoroge, and Peter Muiruri
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Gynecology ,Cervical cancer ,medicine.medical_specialty ,business.industry ,Developing country ,Qualitative property ,Disease ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,Health facility ,030220 oncology & carcinogenesis ,Family medicine ,Health care ,medicine ,030212 general & internal medicine ,business ,Screening procedures ,Qualitative research - Abstract
Background: Cervical cancer is the commonest cause of cancer-related morbidity and mortality among women in developing countries in sub-Saharan Africa. Screening for cervical cancer among HIV infected women is crucial as they are more at risk of developing the disease and progressing faster once infected with Human Papilloma Virus (HPV).Methods: We aimed to determine the factors affecting the utilization of cervical cancer screening among HIV infected women above 18 years of age at Kenyatta National Hospital by conducting a cross-sectional mixed quantitative and qualitative methods study. Descriptive and inferential analysis was carried out on quantitative data to determine significant associations with cervical cancer utilization. Qualitative data were analyzed after coding for significant clauses and transcribing to determine themes arising.Results: Three hundred and twenty eight of the total 387 women enrolled reported they had been advised by their health providers to go for screening. However, only 179 (46%) reported cervical cancer screening. Women were more likely to report cervical cancer screening if recommendation by a staff was made (p
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- 2017
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7. Non-Hodgkin's lymphomas at Kenyatta the National Hospital Nairobi in the 1990's
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A Musibi, NA Othieno-Abinya, L. O. Nyabola, HO Abwao, E Njuguna, P Ndege, J. M. D. Maina, and A Opiyo
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Adult ,Male ,Vincristine ,Pediatrics ,medicine.medical_specialty ,Cyclophosphamide ,Adolescent ,medicine.medical_treatment ,Prednisolone ,CHOP ,Prednisone ,Antineoplastic Combined Chemotherapy Protocols ,medicine ,Humans ,Lymphoma, AIDS-Related ,Retrospective Studies ,Chemotherapy ,business.industry ,Standard treatment ,Lymphoma, Non-Hodgkin ,Retrospective cohort study ,General Medicine ,Middle Aged ,medicine.disease ,Kenya ,Lymphoma ,Doxorubicin ,Female ,business ,medicine.drug - Abstract
Objectives: To determine the clinico-pathologic and prognostic factors, treatment and outcome of non-Hodgkin's lymphomas as seen at the Kenyatta National Hospital in the 1990s. Design: Retrospective study of patients with non-Hodgkin's Iymphoma. Setting: Kenyatta National Hospital, Nairobi, Kenya, between January 1990 and January 2000 inclusive. Subjects: Patients aged 13 years and above, with non-Hodgkin's Iymphomas. Results: Case records were available for 207 patients, 146 males and 60 females, with one having had gender not clarified. Fifty two per cent of the patients were aged less than 40 years and 18.4% over 60 years. Forty one per cent were not properly classified histologically, seventy patients out of 190 evaluable (36.8%) had stages IVA and IVB disease at diagnosis. Twenty five out of 77(32.5%) tested positive for HIV infection, none of them being of the indolent variety. Up to 57.1% of cases of Burkitt's lymphoma tested positive for HIV infection. Cyclophosphamide, doxorubicin, vincristine and prednisone, (CHOP) chemotherapy was given to 68.7% of the patients with complete remission rates of 55.6% for those who got a minimum of six courses of chemotherapy. Only 15.3% of 105 patients evaluable were followed up for 36 months and above, the majority of patients having been lost to follow-up. Poor performance status at diagnosis correlated with shorter follow-up durations (p Conclusion: A good percentage of the patients were not comprehensively characterized pathologically. Standard treatment was offered to the majority of patients, and those who could afford to purchase the medicines stood good chance of achieving complete remission. Poor performance status at diagnosis correlated with shorter follow-up durations and early stage disease correlated with longer follow-up durations. Overall, the outlook for NHLs treated at KNH in the 1990s appears to have improved tremendously. East African Medical Journal Vol.81(9) 2004: 450-458
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- 2005
8. Gender relations and women's empowerment in small-scale irrigated forage production in Ethiopia.
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Omondi I, Njuguna-Mungai E, Derseh MB, Teufel N, Galiè A, Njiru N, Kariuki E, Mulema AA, Baltenweck I, and Jones CS
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- Ethiopia, Female, Humans, Male, Adult, Cross-Sectional Studies, Farmers psychology, Animals, Livestock, Animal Feed, Middle Aged, Agricultural Irrigation, Empowerment
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Small-scale cultivation and irrigation of planted forages can increase the availability of good-quality animal feed in smallholder farms. However, low adoption rates of improved forage technologies in most parts of sub-Saharan Africa have been observed and are partly attributed to limited understanding of gender dynamics in the context of production and utilization of planted forages. The introduction of small-scale cultivation and irrigation of planted forages is likely to interlink gender relations in the mixed crop-livestock farming system given the differences in contributions, benefits and challenges men and women farmers face. Efforts to transform livestock systems through improving adoption, scaling, and sustainability forage interventions can benefit from empirical evidence on gender relations in feed-related activities. We aim to highlight the linkage between gender relations and women's empowerment in the production and utilization of feed resources smallholder settings. We used mixed methods, drawing on quantitative data obtained from a cross-sectional survey of 250 men and 250 women, and qualitative data obtained from eight focus group discussions in smallholder settings of the Amhara and Southern Nations, Nationalities, and People's regions of Ethiopia, where small-scale irrigation was introduced to boost the production of cultivated forages by households. We used the Women's Empowerment in Livestock Index tool to elicit data and analyze the empowerment of the sampled men and women. Women's empowerment differed significantly with different dimensions of gender relations, types of forages grown, and small-scale irrigation practice. Moreover, women in households practicing small-scale irrigation of planted forages were significantly more empowered and most (80%) achieved the adequate threshold in "work balance". The study findings point to the positive link between empowerment and the likely shifts in gender relations from the practice of small-scale production and irrigation of forages., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Omondi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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9. A technical approach to global plant genome editing regulation.
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Groover E, Njuguna E, Bansal KC, Muia A, Kwehangana M, Simuntala C, Mills RL, Kwakye E, Rocha P, Amedu J, Morillo E, Anthonysamy MA, Khaldun ABM, Chimpepo L, Akoudjin M, Senanayake DMJB, Wangmo D, Atnafu D, Eusebio GP, Kongsawat C, and Kliegman M
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Competing Interests: Competing interests: The authors declare no competing interests.
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- 2024
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10. Potential effectiveness of integrating human milk banking and lactation support on neonatal outcomes at Pumwani Maternity Hospital, Kenya.
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Wilunda C, Israel-Ballard K, Wanjohi M, Lang'at N, Mansen K, Waiyego M, Kibore M, Kamande E, Zerfu T, Kithua A, Muganda R, Muiruri J, Maina B, Njuguna E, Njeru F, Kiige LW, Codjia P, Samburu B, Mogusu E, Ngwiri T, Mirie W, and Kimani-Murage EW
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- Infant, Infant, Newborn, Female, Humans, Pregnancy, Kenya, Hospitals, Maternity, Mothers, Lactation, Milk, Human, Breast Feeding
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We assessed the potential effectiveness of human milk banking and lactation support on provision of human milk to neonates admitted in the newborn unit (NBU) at Pumwani Maternity Hospital, Kenya. This pre-post intervention study collected data from mothers/caregivers and their vulnerable neonates or term babies who lacked sufficient mother's milk for several reasons admitted in the NBU. The intervention included establishing a human milk bank and strengthening lactation support. Preintervention data were collected between 5 October 2018 and 11 November 2018, whereas postintervention data were collected between 4 September 2019 and 6 October 2019. Propensity score-matched analysis was performed to assess the effect of the intervention on exclusive use of human milk, use of human milk as the first feed, feeding intolerance and duration of NBU stay. The surveys included 123 and 116 newborns at preintervention and postintervention, respectively, with 160 newborns (80 in each group) being included in propensity score matched analysis. The proportion of neonates who exclusively used human milk during NBU stay increased from 41.3% preintervention to 63.8% postintervention (adjusted odds ratio [OR]: 2.68; 95% confidence interval [CI]: 1.31, 5.53) and those whose first feed was human milk increased from 55.0% preintervention to 83.3% postintervention (adjusted OR: 5.09; 95% CI: 2.18, 11.88). The mean duration of NBU stay was 27% (95% CI: 5.8%, 44.0%) lower in the postintervention group than in the preintervention group. The intervention did not affect feeding intolerance. Integrating human milk banking and lactation support may improve exclusive use of human milk among vulnerable neonates in a resource limited setting., (© 2023 The Authors. Maternal & Child Nutrition published by John Wiley & Sons Ltd.)
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- 2024
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11. Investigating donor human milk composition globally to develop effective strategies for the nutritional care of preterm infants: Study protocol.
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Perrin MT, Mansen K, Israel-Ballard K, Richter S, Bode L, Hampel D, Shahab-Ferdows S, Allen LH, Maggio FC, Njuguna E, Tran HT, and Wesolowska A
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- Female, Humans, Infant, Infant, Newborn, Infant, Premature, Nutrients, Nutritional Support, Multicenter Studies as Topic, Milk Banks, Milk, Human
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Background: Globally, almost 15 million infants are born prematurely each year, disproportionately affecting low and middle-income countries. In the absence of mother's milk, the World Health Organization recommends using donor human milk (DHM) due to its protective effect against necrotizing enterocolitis, a life-threatening intestinal disorder. The use of DHM is increasing globally, with many low and middle-income countries integrating donor milk banks into their public health strategies to reduce neonatal mortality, yet very little is known about the nutritional composition of DHM. Additional knowledge gaps include how DHM composition is influenced by milk banking practices, and whether preterm nutrient recommendations are achieved when DHM is used with commercially available fortifiers., Methods: We designed a multi-site study with eight geographically diverse milk bank partners in high, middle, and low-income settings that will examine and compare a broad range of nutrients and bioactive factors in human milk from 600 approved milk bank donors around the world to create comprehensive, geographically diverse nutrient profiles for DHM. We will then simulate the random pooling of 2 to 10 donors to evaluate the impact of pooling as a potential strategy for milk banks to manage nutrient variability in DHM. Finally, we will evaluate whether commercially available fortifiers meet nutrient recommendations when used with DHM., Discussion: We expect that results from this study will improve nutritional care globally for the growing number of preterm infants who receive donor human milk., Competing Interests: We have the following competing interests to report: MTP served on the Board of Directors for the Human Milk Banking Association of North America from 2016 to 2020 in an unpaid capacity. MTP has received funding to study donor human milk from the National Institute of Child Health and Human Development (NICHD) and the Allen Foundation. KM serves on the Board of Directors for the Northwest Mothers Milk Bank in an unpaid capacity. KIB serves on the Board of Directors for the Human Milk Banking Association of North America in an unpaid capacity. LB is UC San Diego Chair of Collaborative Human Milk Research endowed by the Family Larsson-Rosenquist Foundation (FLRF), Switzerland. LB is a co-inventor on patent applications related to the use of HMOs in preventing NEC and other inflammatory diseases. AW is a co-inventor on patent applications related to the techniques of preservation of human milk. The remaining authors have no competing interests to declare. This does not alter our adherence to PLOS ONE policies on sharing data and materials., (Copyright: This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.)
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- 2023
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12. Achieving climate justice, safeguarding planetary health: Diagnosis and demands from next generation leaders for COP27 and beyond.
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Guinto RR, Deivanayagam TA, Chuji PT, Hossan A, Jensen A, Jung L, Njuguna E, Osborne R, Otieno MA, Siddiqa A, Singh A, and Taomia BKE
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Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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13. Technical efficiency and technology gaps of sorghum plots in Uganda: A gendered stochastic metafrontier analysis.
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Miriti P, Otieno DJ, Chimoita E, Bikketi E, Njuguna E, and Ojiewo CO
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Sorghum plot managers in different locations have varying levels of resource endowment that in turn influence technical efficiency (TE). Therefore, plot managers operate at different levels of technology. The present study applied a stochastic metafrontier approach to assess TE and technology gaps of female, male and jointly-managed sorghum plots. A two limit-Tobit model was subsequently applied to assess determinants of TE. Results indicate that male-managed sorghum plots had the highest metafrontier technical efficiencies (MTEs) (61%, 56% and 15%) and technology gap ratios (TGRs) (98%, 92% and 20%) for Lira, Serere and Kumi districts, respectively compared to female and jointly managed plots. However, jointly managed plots had higher TE and TGRs compared to female plot managers but lower than those of the male-managed plots. Age, distance to plot and farmer group membership influenced TE positively while household size, years of farming sorghum and access to credit had negative effects on efficiency., Competing Interests: The authors declare no conflict of interest., (© 2021 The Authors.)
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- 2021
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14. Advances in Crop Improvement and Delivery Research for Nutritional Quality and Health Benefits of Groundnut ( Arachis hypogaea L.).
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Ojiewo CO, Janila P, Bhatnagar-Mathur P, Pandey MK, Desmae H, Okori P, Mwololo J, Ajeigbe H, Njuguna-Mungai E, Muricho G, Akpo E, Gichohi-Wainaina WN, Variath MT, Radhakrishnan T, Dobariya KL, Bera SK, Rathnakumar AL, Manivannan N, Vasanthi RP, Kumar MVN, and Varshney RK
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Groundnut is an important global food and oil crop that underpins agriculture-dependent livelihood strategies meeting food, nutrition, and income security. Aflatoxins, pose a major challenge to increased competitiveness of groundnut limiting access to lucrative markets and affecting populations that consume it. Other drivers of low competitiveness include allergens and limited shelf life occasioned by low oleic acid profile in the oil. Thus grain off-takers such as consumers, domestic, and export markets as well as processors need solutions to increase profitability of the grain. There are some technological solutions to these challenges and this review paper highlights advances in crop improvement to enhance groundnut grain quality and nutrient profile for food, nutrition, and economic benefits. Significant advances have been made in setting the stage for marker-assisted allele pyramiding for different aflatoxin resistance mechanisms- in vitro seed colonization, pre-harvest aflatoxin contamination, and aflatoxin production-which, together with pre- and post-harvest management practices, will go a long way in mitigating the aflatoxin menace. A breakthrough in aflatoxin control is in sight with overexpression of antifungal plant defensins, and through host-induced gene silencing in the aflatoxin biosynthetic pathway. Similarly, genomic and biochemical approaches to allergen control are in good progress, with the identification of homologs of the allergen encoding genes and development of monoclonal antibody based ELISA protocol to screen for and quantify major allergens. Double mutation of the allotetraploid homeologous genes, FAD2A and FAD2B , has shown potential for achieving >75% oleic acid as demonstrated among introgression lines. Significant advances have been made in seed systems research to bridge the gap between trait discovery, deployment, and delivery through innovative partnerships and action learning., (Copyright © 2020 Ojiewo, Janila, Bhatnagar-Mathur, Pandey, Desmae, Okori, Mwololo, Ajeigbe, Njuguna-Mungai, Muricho, Akpo, Gichohi-Wainaina, Variath, Radhakrishnan, Dobariya, Bera, Rathnakumar, Manivannan, Vasanthi, Kumar and Varshney.)
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- 2020
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15. Assessing Factors Associated With Survival Among Cervical Cancer Patients in Kenya: A Retrospective Follow-up Study.
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Osok D, Karanja S, Kombe Y, Njuguna E, and Todd J
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Background: Cervical cancer ranks as the fourth most commonly diagnosed cancer and the fourth leading cause of cancer death in women worldwide. In Kenya, cervical cancer is the second most commonly diagnosed cancer after breast cancer and the leading cause of cancer death in women. It is estimated that by the end of 2018, cervical cancer will be responsible for 5,250 (11%) new cases and 3,286 (11.84%) deaths in Kenya., Methods: We conducted a retrospective follow-up study to estimate the overall survival of women treated for cervical cancer in Kenya. Medical records were reviewed to extract information for generating a quantitative data set, and the chi-square test was used to test for associations between patient outcomes and various sociodemographic and clinical factors. To estimate overall survival after treatment, we used Kaplan-Meier survival analysis, the logrank test, and Cox proportional hazards regression., Results: A total of 481 patient records were included in this study. From the bivariate analysis, 4 factors demonstrated a statistically significant association with survival: access to care ( P =.049), stage of disease at diagnosis ( P <.001), type of treatment received ( P <.001), and whether or not treatment was initiated and completed ( P <.001). The overall 5-year survival estimate for women with cervical cancer was 59%. However, 396 (82.3%) women were lost to follow-up; with no deaths observed after the first year, the overall survival estimate is only accurate for the first year., Conclusion: The high rate of loss to follow-up appears to be characteristic of cancer care in Kenya and highlights the difficulties in conducting survival studies in low-resource settings with low coverage of vital registration and a lack of centralised national administrative systems. Despite the study's limitations, the results support evidence whereby late-stage diagnosis, deficiencies in cancer management, and limited cancer care services, in particular, have been found to contribute to poor patient outcomes in sub-Saharan Africa., Competing Interests: Competing Interests: None declared., (© The East African Health Research Commission 2018.)
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- 2018
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16. Characteristics of soils in selected maize growing sites along altitudinal gradients in East African highlands.
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Njuguna E, Gathara M, Nadir S, Mwalusepo S, Williamson D, Mathé PE, Kimani J, Landmann T, Juma G, Ong'amo G, Gatebe E, Ru BL, and Calatayud PA
- Abstract
Maize is the main staple crop in the East African Mountains. Understanding how the edaphic characteristics change along altitudinal gradients is important for maximizing maize production in East African Highlands, which are the key maize production areas in the region. This study evaluated and compared the levels of some macro and micro-elements (Al, Ca, Fe, K, Mg, Mn, Na and P) and other soil parameters (pH, organic carbon content, soil texture [i.e. % Sand, % Clay and % Silt], cation exchange capacity [CEC], electric conductivity [EC], and water holding capacity [HC]). Soil samples were taken from maize plots along three altitudinal gradients in East African highlands (namely Machakos Hills, Taita Hills and Mount Kilimanjaro) characterized by graded changes in climatic conditions. For all transects, pH, Ca, K and Mg decreased with the increase in altitude. In contrast, % Silt, organic carbon content, Al and water holding capacity (HC) increased with increasing altitude. The research provides information on the status of the physical-chemical characteristics of soils along three altitudinal ranges of East African Highlands and includes data available for further research.
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- 2015
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17. Brachypodium distachyon promoters as efficient building blocks for transgenic research in maize.
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Coussens G, Aesaert S, Verelst W, Demeulenaere M, De Buck S, Njuguna E, Inzé D, and Van Lijsebettens M
- Subjects
- Gene Expression Regulation, Plant, Genes, Reporter, Glucuronidase genetics, Glucuronidase metabolism, Plant Proteins metabolism, Plants, Genetically Modified metabolism, Ubiquitin metabolism, Zea mays metabolism, Brachypodium genetics, Plant Proteins genetics, Plants, Genetically Modified genetics, Promoter Regions, Genetic, Ubiquitin genetics, Zea mays genetics
- Abstract
The biotechnological approach to improve performance or yield of crops or for engineering metabolic pathways requires the expression of a number of transgenes, each with a specific promoter to avoid induction of silencing mechanisms. In maize (Zea mays), used as a model for cereals, an efficient Agrobacterium tumefaciens-mediated transformation system has been established that is applied for translational research. In the current transformation vectors, the promoters of the 35S gene of the cauliflower mosaic virus and of the ubiquitin gene of maize are often used to drive the bialaphos-selectable marker and the transgene, respectively. To expand the number of promoters, genes with either constitutive or seed-specific expression were selected in Brachypodium distachyon, a model grass distantly related to maize. After the corresponding Brachypodium promoters had been fused to the β-glucuronidase reporter gene, their activity was followed throughout maize development and quantified in a fluorimetric assay with the 4-methylumbelliferyl β-D-glucuronide substrate. The promoters pBdEF1α and pBdUBI10 were constitutively and highly active in maize, whereas pBdGLU1 was clearly endosperm-specific, hence, expanding the toolbox for transgene analysis in maize. The data indicate that Brachypodium is an excellent resource for promoters for transgenic research in heterologous cereal species.
- Published
- 2012
- Full Text
- View/download PDF
18. Acceptability of human immunodeficiency virus testing in patients with invasive cervical cancer in Kenya.
- Author
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Gichangi P, Estambale B, Bwayo J, Rogo K, Ojwang S, Njuguna E, and Temmerman M
- Subjects
- AIDS Serodiagnosis, Adult, Contact Tracing, Enzyme-Linked Immunosorbent Assay, Female, HIV Infections epidemiology, HIV-1 immunology, HIV-1 isolation & purification, Humans, Kenya epidemiology, Patient Acceptance of Health Care, Surveys and Questionnaires, Urban Health, Uterine Cervical Neoplasms epidemiology, HIV Infections virology, HIV Seroprevalence, Uterine Cervical Neoplasms virology
- Abstract
Invasive cervical cancer (ICC) is common in areas where human immunodeficiency virus (HIV) is also prevalent. Currently, HIV seroprevalence as well as acceptability of HIV testing in ICC patients in Kenya is unknown. The objective of this study was to determine the acceptability of HIV testing among patients with ICC. Women with histologically verified ICC at Kenyatta National Hospital participated in the study. A structured questionnaire was administered to patients who gave informed consent. HIV pre- and posttesting counseling was done. Blood was tested for HIV using enzyme-linked immunosorbent assay. Overall, 11% of ICC patients were HIV seropositive. The acceptance rate of HIV testing was 99%; yet, 5% of the patients did not want to know their HIV results. Patients less than 35 years old were two times more likely to refuse the result of the HIV test (odds ratio [OR] 2.2). Patients who did not want to know their HIV results were three times more likely to be HIV seropositive (OR 3.1). Eighty four percent of the patients were unaware of their HIV seropositive status. The HIV-1 seroprevalence in ICC patients was comparable to the overall seroprevalence in Kenya. ICC patients were interested in HIV testing following pretest counseling. Offering routine HIV testing is recommended in ICC patients.
- Published
- 2006
- Full Text
- View/download PDF
19. Early development of vaginal shortening during radiation therapy for endometrial or cervical cancer.
- Author
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Katz A, Njuguna E, Rakowsky E, Sulkes A, Sulkes J, and Fenig E
- Subjects
- Aged, Aged, 80 and over, Brachytherapy, Constriction, Pathologic, Female, Humans, Medical Records, Middle Aged, Retrospective Studies, Endometrial Neoplasms radiotherapy, Uterine Cervical Neoplasms radiotherapy, Vagina pathology, Vagina radiation effects
- Abstract
Vaginal necrosis can occur following radiation therapy for gynecological malignancies. The distal vaginal mucosa has a poorer radiation tolerance than the mucosa in the upper region. We examined the extent of vaginal shortening in patients treated by intravaginal brachytherapy with or without pelvic irradiation. Maximal extension of the vaginal cylinder above the pubis was measured for each insertion. We found that the difference in mean values between insertions (2.3 vs. 1.7 cm) was highly statistically significant (P < 0.0001). Our study shows that vaginal shortening can occur during the course of intracavity and external irradiation. These alterations in vaginal anatomy can have important consequences on doses received by the distal vaginal mucosa.
- Published
- 2001
- Full Text
- View/download PDF
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