43 results on '"Yamani, Laura Navika"'
Search Results
2. Implementation of Artificial Neural Network (ANN) to Construct Model for Stunting in Toddlers
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Prabiantissa, Citra Nurina, primary, Yamani, Laura Navika, additional, Hakimah, Maftahatul, additional, Puspitasari, Ira, additional, and Rozi, Nanang Fakhrur, additional
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- 2024
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3. Public Transportation Strategy in Response to Covid-19
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Farizd, Miftah, primary, Wahyuni, Chatarina Umbul, additional, and Yamani, Laura Navika, additional
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- 2023
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4. Seroprevalence of SARS-CoV-2 anti-spike IgG antibody among COVID-19 vaccinated individuals residing in Surabaya, East Java, Indonesia
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Megasari, Ni Luh Ayu, primary, Yamani, Laura Navika, additional, Juniastuti, Juniastuti, additional, Lusida, Maria Inge, additional, and Mori, Yasuko, additional
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- 2023
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5. Immunization Program Intervention Training in Stunting Prevention Effort in Sampang Regency, Madura Island, East Java
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Artanti, Kurnia Dwi, primary, Hargono, Arief, additional, Yamani, Laura Navika, additional, Fadhilah, Farah, additional, and Hasan, Taufiq Hidayat, additional
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- 2023
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6. SARS-CoV-2 IgG antibody status in unvaccinated and 2-dose vaccinated Indonesians by AstraZeneca.
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YAMANI, LAURA NAVIKA, JUNIASTUTI, MEGASARI, NI LUH AYU, UTSUMI, TAKAKO, SAHILA, NUR, PANGESTIKA, ALIFIA SALMA, PUTRI, SERIUS MILIYANI DWI, YI LI, CHUNG, MARTINI, SANTI, ISFANDIARI, MUHAMMAD ATOILLAH, and LUSIDA, MARIA INGE
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MEDICAL personnel , *VACCINATION status , *VACCINATION , *IMMUNOGLOBULIN G , *ANTIBODY formation - Abstract
Indonesia began deploying a COVID-19 vaccine in January 2021, prioritising vaccination for high-risk groups such as healthcare workers, the elderly and those with comorbidities, and ending with the general public due to limited vaccine availability. Our study aimed to evaluate antibody response in Indonesians who had received two doses of the vaccine vs. those who had not. The study design was a cohort study involving 46 unvaccinated people and 23 people who had received the second dose of the AstraZeneca vaccine in three months. Methods used for the qualitative and quantitative detection of IgG antibodies included rapid RI-GHA and ELISA tests. Findings showed that positive IgG antibodies qualitatively detected by the rapid RI-GHA test were significantly higher in those vaccinated (60.9%) than in unvaccinated people (26.1%). Using the ELISA assay, all vaccinated individuals qualitatively showed positive antibodies (cut-off ≥4.33 BAU/ml), and the average quantitative titer of anti-SARS-CoV-2 s-RBD IgG was significantly higher in vaccinated (157.06±238.68 BAU/ml) than in unvaccinated (51.90±87.60 BAU/ml) individuals. Some unvaccinated individuals with no history of infection were found to have anti-SARS-CoV-2 antibodies that may have been previously asymptomatic, although their mean antibody titers were certainly lower than those in the 2-dose group. Approximately 56% of vaccinated individuals had antibody titers above 60 BAU/ml as a cut-off for protective threshold, a significantly higher proportion than unvaccinated individuals. In conclusion, vaccination with two doses AstraZeneca increased anti-SARS-CoV-2 antibodies which resulted in enhanced immunity against symptomatic COVID-19. [ABSTRACT FROM AUTHOR]
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- 2023
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7. Detection of Tuberculosis in Toddlers and its Risk Factor at East Perak Health Center Surabaya
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Azzahrain, Alifa Salsabila, primary, Afifah, Anisa Nur, additional, and Yamani, Laura Navika, additional
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- 2023
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8. Adverse Reactions of COVID-19 Vaccines: A Scoping Review of Observational Studies
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Dhamanti, Inge, primary, Suwantika, Auliya A, additional, Adlia, Amirah, additional, Yamani, Laura Navika, additional, and Yakub, Fitri, additional
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- 2023
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9. Adverse Reactions of COVID-19 Vaccines: A Scoping Review of Observational Studies
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Dhamanti,Inge, Suwantika,Auliya A, Adlia,Amirah, Yamani,Laura Navika, Yakub,Fitri, Dhamanti,Inge, Suwantika,Auliya A, Adlia,Amirah, Yamani,Laura Navika, and Yakub,Fitri
- Abstract
Inge Dhamanti,1â 3 Auliya A Suwantika,4â 6 Amirah Adlia,7 Laura Navika Yamani,8,9 Fitri Yakub10 1Department of Health Policy and Administration, Faculty of Public Health, Universitas Airlangga, Surabaya, Indonesia; 2Center for Patient Safety Research, Universitas Airlangga, Surabaya, Indonesia; 3School of Psychology and Public Health, La Trobe University, Melbourne, VIC, Australia; 4Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Bandung, Indonesia; 5Center of Excellence in Higher Education for Pharmaceutical Care Innovation, Universitas Padjadjaran, Bandung, Indonesia; 6Center for Health Technology Assessment, Universitas Padjadjaran, Bandung, Indonesia; 7Department of Pharmaceutics, School of Pharmacy, Institut Teknologi Bandung, Bandung, Indonesia; 8Division Epidemiology, Faculty of Public Health, Universitas Airlangga, Surabaya, Indonesia; 9Research Center on Global Emerging and Re-Emerging Infectious Diseases, Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia; 10Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Skudai, MalaysiaCorrespondence: Inge Dhamanti, Tel +62315920948, Email inge-d@fkm.unair.ac.idAbstract: The COVID-19 pandemic had a severe global impact. A range of campaigns and activities, including vaccines, are being implemented to counteract this pandemic. Using observational data, the goal of this scoping review is to identify adverse events connected with COVID-19 vaccinations. We conduct a scoping study and searched three databases from the start of the COVID-19 pandemic in 2020 through June 2022. Based on our criteria and searched keywords, the review included eleven papers in total, with the majority of the studies being conducted in developed countries. The study populations varied and included general community populations, healthcare professionals, military forces, and patients with systemic lupus and cancer. This study includes vacc
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- 2023
10. A household survey of intrafamily norovirus transmission.
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Juniastuti, Utsumi, Takako, Yamani, Laura Navika, Dinana, Zayyin, Gunawan, Emily, Maharani, Aussie Tahta, Fitria, Anisa Lailatul, Wahyuni, Rury M., Soetjipto, Doan, Yen Hai, Shimizu, Hiroyuki, Ishii, Koji, Matsui, Chieko, Deng, Lin, Abe, Takayuki, Katayama, Kazuhiko, Lusida, Maria Inge, and Shoji, Ikuo
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HOUSEHOLD surveys ,NOROVIRUSES ,GASTROENTERITIS ,HOUSEHOLDS - Abstract
Norovirus (NoV) is a leading cause of epidemic and sporadic gastroenteritis in people of all ages. Humans are the primary source of NoV and household contact is one of the risk factors for NoV transmission. However, the mechanisms underlying person‐to‐person NoV transmission are poorly understood. Here we conducted a survey to profile the frequency and characteristics of intrafamily NoV transmission. Stool samples were collected every week from three households between 2016 and 2020; the total number of samples was 1105. The detection of NoV and the genotyping were performed by reverse transcription‐polymerase chain reaction targeting the capsid region and direct sequencing methods. NoV was detected in 3.4% of all samples. Eight NoV genotypes were identified. The most common genotype was GII.17, followed in order by GII.6, GI.6, GII.4, GI.3, and GI.2/GI.8/GI.9. Most NoV‐positive samples were obtained from asymptomatic individuals. The highest number of NoV transmissions was found in household 3 (6 infections), followed by household 2 (2 infections), while household 1 had no NoV transmission, suggesting that asymptomatic NoV carriers play a major role in infection as NoV reservoirs in the households. Further clarification of the mode of infection will contribute to improved understanding and an appropriate prevention. [ABSTRACT FROM AUTHOR]
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- 2023
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11. Seroprevalence of SARS-CoV-2 anti-spike IgG antibody among COVID-19 vaccinated individuals residing in Surabaya, East Java, Indonesia.
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Ni Luh Ayu Megasari, Yamani, Laura Navika, Juniastuti, Juniastuti, Lusida, Maria Inge, and Yasuko Mori
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MEDICAL personnel ,BOOSTER vaccines ,COVID-19 ,IMMUNOGLOBULINS ,VACCINATION ,IMMUNOGLOBULIN G - Abstract
Background: To limit the SARS-CoV-2 transmission, the Indonesian government launched a COVID-19 vaccination program in January 2021. Studies on the clinical treatment and implementation of COVID-19 vaccination have shown promising results; however, it is necessary to estimate the effectiveness of the vaccines. With the ongoing COVID-19 pandemic, studies have highlighted the impact of COVID-19 vaccines, especially CoronaVac, on Indonesian healthcare workers. To get a better picture of how the vaccines work in Indonesia, it is necessary to estimate the prevalence of SARS-CoV-2 anti-S IgG antibody induced by the COVID-19 vaccine in individuals who have already received two-to-three doses of vaccines. Materials and Methods: Four-hundred and ninety-six whole-blood samples were collected from participants residing in Surabaya, East Java, Indonesia, who received a minimum of a two-dose COVID-19 vaccine. Serums were then isolated from the blood and subjected to detect SARS-CoV-2 anti-S IgG antibodies using a lateral flow immunochromatographic assay. Results: The prevalence of positive anti-S-IgG antibodies was 91.7% (455/496) in all participants receiving a minimum of a two-dose COVID-19 vaccine. As many as 209 (85.3%) and 141 (96.6%) participants were seropositive for receiving CoronaVac and AstraZeneca, respectively. Meanwhile, all participants receiving two-dose CoronaVac with one booster dose of Moderna (105/100%) were seropositive (p < 0.05). Age, comorbidity, and time after the last vaccine were significantly correlated with seropositivity (p < 0.05). Conclusion: Different vaccines might produce different antibody responses. Adopting a stronger policy regarding the administration of booster doses might be beneficial to elicit positive anti-S-IgG antibodies, especially among older individuals, those with comorbid diseases, and those with a longer time after the second vaccination dose. [ABSTRACT FROM AUTHOR]
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- 2023
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12. Health Literacy: Transisi Pandemi-Endemi Covid-19 pada Guru dalam Akselerasi Pemahaman Siswa di Kecamatan Bulak Surabaya
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Syahrul, Fariani, primary, Adi, Annis Catur, additional, Rachmayanti, Riris Diana, additional, Qurniyawati, Eny, additional, Sari, Siti Shofiya Novita, additional, Ersanti, Arina Mufida, additional, Yamani, Laura Navika, additional, Christanto, Daniel, additional, and Savitri, Faradillah Rahmy, additional
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- 2023
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13. Application of fish flour liquid waste as alternative growth media for producing xylanase
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Budiman, Frederick, primary, Nurrohman, Ardiana Ilham, additional, Ekwanda, Refka Revina Melyata, additional, Wicaksono, Ginarto Arif, additional, Nisa, Khairun, additional, Yamani, Laura Navika, additional, Ilias, Rosli Md., additional, and Puspaningsih, Ni Nyoman Tri, additional
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- 2023
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14. Determination of Relevant Feature Combinations For Detection Stunting Status of Toddlers
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Hakimah, Maftahatul, primary, Prabiantissa, Citra Nurina, additional, Rozi, Nanang Fakhrur, additional, Yamani, Laura Navika, additional, and Puspitasari, Ira, additional
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- 2022
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15. Evaluation Of Hand Hygiene Audit In Preventing Healthcare-Associated Infections At Haji Hospital Surabaya In 2020
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Puspitasari, Novia Indah, primary, Mudjianto, Dwiono, additional, and Yamani, Laura Navika, additional
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- 2022
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16. IMPROVING HIGH SCHOOL STUDENT’S KNOWLEDGE ABOUT COVID-19 AND ITS VACCINATIONS
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Yamani, Laura Navika, primary, Astutik, Erni, additional, Khairunisa, Siti Qamariyah, additional, Nadzifah, Yasmin Nihayatun, additional, and Puspitasari, Novia Indah, additional
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- 2022
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17. Application of fish flour liquid waste as alternative growth media for producing xylanase.
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Budiman, Frederick, Nurrohman, Ardiana Ilham, Ekwanda, Refka Revina Melyata, Wicaksono, Ginarto Arif, Nisa, Khairun, Yamani, Laura Navika, Ilias, Rosli Md., Puspaningsih, Ni Nyoman Tri, Kristiana, Arika Indah, and Alfarisi, Ridho
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FISH protein concentrate ,ALTERNATIVE mass media ,XYLANASES ,FISHERY processing ,LIQUID waste ,PLANT growing media - Abstract
Consumption of processed fish product increase year by year, especially fish flour. However, processing fish flour produce untreated wastewater that contains rich element of carbon, nitrogen, and mineral. Those rich elements can be used as alternative bacterial nutrient media. This research aims to devise a combine formulation between fish flour liquid waste and Luria Bertani media. The combine medium was used to grow recombinant Eschericia coli DH5α harboring gene encoding xylanolytic enzyme of pTP510 with ratio of combine medium 1:2, 1:2, and 1:4 compared to Luria Bertani media itself. The result showed that the optimum combine formulation was 1:2 and indicated its activity of 0.7260 Unit/mL and 0.6213 Unit/mL after 9 hours and 12 hours incubation time, respectively. [ABSTRACT FROM AUTHOR]
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- 2022
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18. Complete genome analyses of G12P[8] rotavirus strains from hospitalized children in Surabaya, Indonesia, 2017–2018.
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Yamani, Laura Navika, Utsumi, Takako, Doan, Yen Hai, Fujii, Yoshiki, Dinana, Zayyin, Wahyuni, Rury Mega, Gunawan, Emily, Soegijanto, Soegeng, Athiyyah, Alpha Fardah, Sudarmo, Subijanto Marto, Ranuh, Reza Gunadi, Darma, Andy, Soetjipto, Juniastuti, Bawono, Rheza Gandi, Matsui, Chieko, Deng, Lin, Abe, Takayuki, Shimizu, Hiroyuki, and Ishii, Koji
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HOSPITAL care of children ,ROTAVIRUSES ,WHOLE genome sequencing ,GENOMES ,NUCLEOTIDE sequencing ,REOVIRUSES - Abstract
Rotavirus A (RVA) is a major viral cause of acute gastroenteritis (AGE) worldwide. G12 RVA strains have emerged globally since 2007. There has been no report of the whole genome sequences of G12 RVAs in Indonesia. We performed the complete genome analysis by the next‐generation sequencing of five G12 strains from hospitalized children with AGE in Surabaya from 2017 to 2018. All five G12 strains were Wa‐like strains (G12‐P[8]‐I1‐R1‐C1‐M1‐A1‐N1‐T1‐E1‐H1) and were clustered into lineage‐III of VP7 gene phylogenetic tree. STM430 sample was observed as a mixed‐infection between G12 and G1 strains: G12/G1‐P[8]‐I1‐R1‐C1‐M1‐A1‐N1‐T1‐E1‐H1. A phylogenetic tree analysis revealed that all five Indonesian G12 strains (SOEP379, STM371, STM413, STM430, and STM433) were genetically close to each other in all 11 genome segments with 98.0%–100% nucleotide identities, except VP3 and NSP4 of STM430, suggesting that these strains have originated from a similar ancestral G12 RVA. The VP3 and NSP4 genome segments of STM430‐G12P[8] were separated phylogenetically from those of the other four G12 strains, probably due to intra‐genotype reassortment between the G12 and G1 Wa‐like strains. The change from G12P[6] lineage‐II in 2007 to G12P[8] lineage‐III 2017–2018 suggests the evolution and diversity of G12 RVAs in Indonesia over the past approximately 10 years. [ABSTRACT FROM AUTHOR]
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- 2023
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19. EVALUASI PELAKSANAAN SISTEM SURVEILANS HEALTHCARE ACQUIRED INFECTIONS (HAIS) DI RSU HAJI SURABAYA TAHUN 2020
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Rosyida, Aulia, primary, Yamani, Laura Navika, additional, and Mudjianto, Dwiono, additional
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- 2021
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20. Evaluasi Audit Hand Hygiene dalam Mencegah Healthcare-Associated Infections di RSU Haji Surabaya Tahun 2020.
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Puspitasari, Novia Indah, Mudjianto, Dwiono, and Yamani, Laura Navika
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CROSS infection prevention ,AUDITING ,RESEARCH methodology ,INTERVIEWING ,CROSS infection ,PROFESSIONAL competence ,PUBLIC hospitals ,HAND washing ,EVALUATION - Published
- 2022
21. Viral shedding and the durability of immunoglobulin G antibodies to severe acute respiratory syndrome coronavirus 2.
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Lusida, Maria Inge, Gunawan, Emily, Megasari, Ni Luh Ayu, Yamani, Laura Navika, Juniastuti, Utsumi, Takako, and Mori, Yasuko
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SARS-CoV-2 ,VIRAL shedding ,IMMUNOGLOBULIN G - Abstract
We followed 45 participants in Surabaya, Indonesia, for 10 months and compared their PCR and severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) immunoglobulin G (IgG) results. As much as 13 out of 45 participants were IgG seropositive at least once while the remaining 32 stayed IgG seronegative throughout the study. Among 13 seropositive participants, 9 were consecutively seropositive at least twice and were eligible for IgG longevity evaluation. The duration of IgG detection varied from 47 to ≥233 days. We observed intermittent re‐positive PCR results suggestive of viral shedding in participants with a longer duration of IgG detection. [ABSTRACT FROM AUTHOR]
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- 2022
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22. Different Variants in Reverse Transcriptase Domain Determined by Ultra-deep Sequencing in Treatment-naive and Treated Indonesian Patients Infected with Hepatitis B Virus
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Wasityastuti, Widya, Yano, Yoshihiko, Widasari, Dewiyani Indah, Yamani, Laura Navika, Ratnasari, Neneng, Heriyanto, Didik Setyo, Okada, Rina, Tanahashi, Toshihito, Murakami, Yoshiki, Azuma, Takeshi, and Hayashi, Yoshitake
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- 2016
23. Seroepidemiological study of SARS-CoV-2 infection in East Java, Indonesia.
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Megasari, Ni Luh Ayu, Utsumi, Takako, Yamani, Laura Navika, Juniastuti, Gunawan, Emily, Furukawa, Koichi, Nishimura, Mitsuhiro, Lusida, Maria Inge, and Mori, Yasuko
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COVID-19 ,SARS-CoV-2 ,PANDEMICS ,MEDICAL personnel ,COVID-19 pandemic ,HEALTH facilities - Abstract
Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has led to a global pandemic, including Indonesia. However, there are only limited data regarding the precise prevalence of the COVID-19 pandemic in Indonesia. Here, to estimate the magnitude of SARS-CoV-2 infection in East Java, Indonesia, we investigated the prevalence of immunoglobulin G (IgG) antibodies. We enrolled 1,819 individuals from June to December 2020 and observed that the subjects' overall prevalence of IgG antibody to SARS-CoV-2 was 11.4% (207/1,819). The prevalence of anti-SARS-CoV-2 antibodies differed significantly between the job/occupation groups (P = 0.0001). A greater prevalence of IgG was detected in laboratory technicians (who take samples from suspected cases and deal with polymerase chain reaction [PCR] procedures, 22.2%) compared to medical personnel who see and take direct care of patients with COVID-19 (e.g., physicians and nurses, 6.0%), other staff in medical facilities (2.9%), general population (12.1%) and non-COVID-19 patients (14.6%). The highest prevalence among age groups was in the 40–49-year-olds (14.8%), and the lowest prevalence was in the 20–29-year-olds (7.4%). However, the younger population still showed a higher prevalence than generally reported, suggesting greater exposure to the virus but less susceptibility to the disease. A geographical difference was also observed: a higher prevalence in Surabaya (13.1%) than in Jombang (9.9%). In conclusion, the COVID-19 outbreak among asymptomatic populations was characterized by a high prevalence of infection in East Java, Indonesia. [ABSTRACT FROM AUTHOR]
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- 2021
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24. Prevalence and Distribution of Rotavirus Genotypes Among Children With Acute Gastroenteritis in Areas Other Than Java Island, Indonesia, 2016–2018.
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Wahyuni, Rury Mega, Utsumi, Takako, Dinana, Zayyin, Yamani, Laura Navika, Juniastuti, Wuwuti, Ishak Samuel, Fitriana, Elsa, Gunawan, Emily, Liang, Yujiao, Ramadhan, Fitratul, Soetjipto, Lusida, Maria Inge, and Shoji, Ikuo
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GASTROENTERITIS ,NOROVIRUS diseases ,ROTAVIRUSES ,GENOTYPES ,CHILD patients ,ISLANDS ,SEQUENCE analysis - Abstract
Group A rotaviruses (RVAs) are the leading cause of acute gastroenteritis, which is often associated with severe symptoms in children under 5 years old. Genetic reassortments and interspecies transmission commonly occur, resulting in a great diversity of RVA circulating in the world. The aim of this study is to determine the prevalence and distribution of RVA genotypes among children in Indonesia over the years 2016–2018 across representative areas of the country. Stool samples were collected from 202 pediatric patients with acute gastroenteritis in three regions of Indonesia (West Nusa Tenggara, South Sumatra, and West Papua) in 2016–2018. Rotavirus G and P genotypes were determined by reverse transcription PCR (RT-PCR) and direct sequencing analysis. The prevalences of RVA in South Sumatra (55.4%) and West Papua (54.0%) were significantly higher than that in East Java (31.7%) as determined in our previous study. The prevalence in West Nusa Tenggara (42.6%) was the lowest among three regions, but higher than that in East Java. Interestingly, equine-like G3 rotavirus strains were found as predominant strains in South Sumatra in 2016 and in West Papua in 2017–2018. Moreover, the equine-like G3 strains in South Sumatra detected in 2016 were completely replaced by human G1 and G2 in 2018. In conclusion, RVA infection in South Sumatra and West Papua was highly endemic. Equine-like G3 strains were also spread to South Sumatra (West Indonesia) and West Papua (East Indonesia), as well as Java Island. Dynamic change in rotavirus genotypes from equine-like G3 to human genotypes was also observed. Continuous monitoring may be warranted in isolated areas in Indonesia. [ABSTRACT FROM AUTHOR]
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- 2021
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25. Equine-like G3 rotavirus strains as predominant strains among children in Indonesia in 2015–2016
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1000010364051, Utsumi, Takako, Wahyuni, Rury Mega, Doan, Yen Hai, Dinana, Zayyin, Soegijanto, Soegeng, Fujii, Yoshiki, Juniastuti, Yamani, Laura Navika, 1000070778414, Matsui, Chieko, Deng, Lin, 1000090403203, Abe, Takayuki, Soetjipto, Lusida, Maria Inge, Ishii, Koji, Shimizu, Hiroyuki, Katayama, Kazuhiko, 1000040356241, Shoji, Ikuo, 1000010364051, Utsumi, Takako, Wahyuni, Rury Mega, Doan, Yen Hai, Dinana, Zayyin, Soegijanto, Soegeng, Fujii, Yoshiki, Juniastuti, Yamani, Laura Navika, 1000070778414, Matsui, Chieko, Deng, Lin, 1000090403203, Abe, Takayuki, Soetjipto, Lusida, Maria Inge, Ishii, Koji, Shimizu, Hiroyuki, Katayama, Kazuhiko, 1000040356241, and Shoji, Ikuo
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Rotavirus A (RVA) is a major cause of acute gastroenteritis in humans and animals worldwide. As a result of the segmented nature of the rotavirus genome, genetic reassortment commonly occurs. This study aims to clarify the genetic characteristics of RVAs circulating in Indonesia. From June 2015 through August 2016, stool samples were collected from 134 children aged <5 years (71 male and 63 female) with acute gastroenteritis who were inpatients at a private hospital in Surabaya, Indonesia. All stool samples were screened for RVA antigen using immunochromatography. Forty-two samples (31.3%, 42/134) were RVA antigen-positive. All RVA positive samples tested showed the unusual combinations of G3P[8] (n = 36) and G3P[6] (n = 3) with a short RNA pattern by G/P typing and polyacrylamide gel electrophoresis (PAGE). Whole genome analysis by next-generation sequencing (NGS) was performed for 11 strains to determine the RVA genotypes. Eleven rotavirus strains were found to carry a DS-like genetic backbone; nine strains showed a G3-P[8]-I2-R2-C2-M2-A2-N2-T2-E2-H2 genome constellation, which was recently reported in Australia, Hungary, Spain and Brazil; as well, two strains showed a G3-P[6]-I2-R2-C2-M2-A2-N2-T2-E2-H2 genome constellation. The phylogenetic tree based on the VP7 gene showed that all 11 strains were classified as equine-like G3, which is genetically distinct and different in origin from typical human G3 strains. The phylogenetic tree based on the NSP4 gene showed that six strains were classified as bovine-like strain and the remaining five were classified as human strain. In conclusion, we identified the strains which are intergenogroup reassortants containing an equine-like G3 VP7, a P[8])/P[6] VP4, with a DS-1-like genetic backbone. These findings suggest that equine-like G3P[8] and P[6] RVA strains have been circulating in the Indonesian population for at least 1 year and probably longer, indicating a diversity of RVAs in this area.
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- 2018
26. Evaluation of the Acute Flaccid Paralysis Surveillance System of Polio Free in East Java, Indonesia, 2019.
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Rasyidi, Alya Hanifa, Suroiyah, Anik, and Yamani, Laura Navika
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ACUTE flaccid paralysis ,POLIO ,SECONDARY analysis - Abstract
Background: Proving that the wild polio virus no longer exists in Indonesia, the symptoms must be found that resemble polio. These symptoms are found in patients with AFP (Acute Flaccid Paralysis). AFP surveillance is an observation made of all cases of acute paralysis or AFP in children aged <15 years who are vulnerable to polio. The priority problem that is still found in the East Java Provincial Health Office regarding AFP surveillance is the reduction in the discovery of non-polio AFP cases and adequate specimens. Aims: The purpose of this study was to analyze the implementation of AFP surveillance activities in the East Java Province Health Office in 2019. Methods: Data collection was carried out by primary and secondary to study the AFP surveillance overview. Primary data were obtained from in depth interviews with AFP surveillance program holders in East Java Provincial Health Office. Secondary data is processed using Microsoft Office Excel, Epi Info and Quantum GIS. Results: The result is in 2019 the rate of non-polio AFP and the percentage of adequate specimens in East Java Province has under the target. In 2019 there was a decrease compared to the previous year, the nonpolio AFP rate was 1.64 and the percentage of adequate specimens was 56.2%. Only as many as six districts / cities in East Java Province had pass these two indicators. Conclusion: The lack of visits and reports from both the hospital and the community is one of causative factor. Intensive and routine AFP surveillance is needed to monitor the emergence of polio cases [ABSTRACT FROM AUTHOR]
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- 2021
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27. Predominance of norovirus GI.4 from children with acute gastroenteritis in Jambi, Indonesia, 2019.
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Wulandari, Putri Sari, Juniastuti, Wahyuni, Rury Mega, Amin, Mochamad, Yamani, Laura Navika, Matondang, Muhammad Qushai Yunifiar, Dinana, Zayyin, Soetjipto, Utsumi, Takako, Shoji, Ikuo, and Lusida, Maria Inge
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GASTROENTERITIS ,SHIGELLOSIS ,POLYMERASE chain reaction - Abstract
Norovirus (NoV) is one of the most important viral causes of acute gastroenteritis (AGE) in children worldwide. Only a few studies have reported AGE with NoV‐positive in some cities in Indonesia. This study aimed to investigate the incidence and clinical characteristic of NoV infection, and also genotype distribution of NoV in children with AGE in Jambi, as the capital and the largest city of Jambi province, Indonesia. Stool samples were collected from children (≤15 years of age) with AGE at three participating hospitals in Jambi from February to April 2019. The detection of NoV and its genotyping were carried out by reverse‐transcriptase polymerase chain reaction and direct sequencing. Of the 91 stool samples collected, 14 (15.4%) were positive for NoV. Fever, vomiting, and severe diarrhea were commonly observed in AGE with NoV, while level of dehydration was statistically significant difference between children with NoV‐positive and those with NoV‐negative. The most prevalent genotype was GI.4 (42.9%), followed by GII.6 (28.6%) and some other genotypes. Interestingly, this study found the predominance of GI.4, differed from previous reports in Indonesia. Continuously investigation of the circulating genotype is needed to control the NoV‐infected AGE. [ABSTRACT FROM AUTHOR]
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- 2020
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28. Identification of Norovirus Infection in Adults with Acute Gastroenteritis in Jambi, Indonesia.
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Wulandari, Putri Sari, Wahyuni, Rury Mega, Amin, Mochamad, Yamani, Laura Navika, Utsumi, Takako, Lusida, Maria Inge, and Juniastuti
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NOROVIRUS diseases ,MEDICAL personnel ,GASTROENTERITIS ,REVERSE transcriptase polymerase chain reaction - Published
- 2020
29. Identification of rotavirus infection during diarrhoea outbreaks among children under five years of age in Lampung, Indonesia.
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Ana, Elsa Fitri, Wahyuni, Rury Mega, Yamani, Laura Navika, Dinana, Zayyin, Oktafiani, Devi, Ni Luh Ayu Megasari, Lusida, Maria Inge, Juniastuti, and Soetjipto
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ROTAVIRUS diseases ,DIARRHEA ,POLYMERASE chain reaction - Abstract
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- 2019
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30. Association between quasispecies variants of hepatitis B virus, as detected by high-throughput sequencing, and progression of advanced liver disease in Indonesian patients.
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Putri, Wahyu Aristyaning, Yano, Yoshihiko, Yamani, Laura Navika, Liang, Yujiao, Mardian, Yan, Utsumi, Takako, Soetjipto, Lusida, Maria Inge, and Hayashi, Yoshitake
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LIVER diseases ,HEPATITIS B virus ,RUBELLA ,DISEASE progression ,B cells ,CHRONIC diseases - Abstract
Mutations in the hepatitis B virus (HBV) X region and truncation of the preS2 region are well-known to affect the progression of liver disease. Recently, it has been observed that an increasing number of S region quasispecies variants are associated with disease progression. However, few studies have analysed quasispecies of the whole genome using high-throughput sequencing methods. Using high-throughput sequencing, whole-genome variations in 12 Indonesian patients infected with HBV (eight with advanced liver disease and four with chronic hepatitis) were examined. Variations with cut-off values of ≥1% of the total viral population were investigated. It was revealed that within the four open reading frames, quasispecies variations of the S and X regions were higher in advanced liver diseases compared with in chronic hepatitis (S region: 89.53 vs. 50.69%, P=0.047; X region: 76.95 vs. 35.88%, P=0.044). Notably, the mutation frequencies in the basal core promoter, B cell epitope, RT Box G, RNAseH and small S region were greater in advanced liver disease. The proportion of quasispecies variants increased for the majority of the mutations, with the exception for W196* in the small S gene, during disease progression. The present study demonstrated that quasispecies in the S and X regions of the HBV genome changed during disease progression and were associated with advanced liver disease development in Indonesian patients with HBV. [ABSTRACT FROM AUTHOR]
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- 2019
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31. Analysis of genetic and serology of hepatitis A virus infection during and after outbreak in two junior high schools in Surabaya, Indonesia.
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Juniastuti, Wahyuddin, Dedy, Nihayatussa'adah, Amin, Mochamad, Yamani, Laura Navika, Utsumi, Takako, Sustini, Florentina, and Lusida, Maria Inge
- Abstract
Outbreaks of hepatitis A have occurred in some cities in Indonesia. In Surabaya, the capital city of East Java province, Indonesia, hepatitis A outbreaks have been reported since2013, with a marked increase in the number of cases in 2015. The aim of the present study was to analyze the genetic and serology of acute symptomatic cases (early infection) during a hepatitis A outbreak and asymptomatic cases after the outbreak in two junior high schools in Surabaya in 2015 to 2016. Students with acute symptomatic hepatitis A during the outbreak and other students who were asymptomatic 3 to 4 months after the outbreak were enrolled. Asymptomatic students had no symptoms from the outbreak until they were enrolled. Sera were collected to identify anti‐hepatitis A virus (HAV) IgM (by enzyme‐linked immunosorbent assay) and HAV genetic variations/genotypes (using polymerase chain reaction [PCR]‐sequencing and phylogenetic analysis). A total of 33 (97.1%) out of 34 sera of students with acute symptoms were positive for anti‐HAV IgM and 18% of them were positive by PCR, identified as HAV subgenotype IA. No prominent amino acid variations were observed from reported HAV sequences from Indonesia. Among 38 sera of asymptomatic students, most (55.3%) were positive for anti‐HAV IgM, while none were positive by PCR. In conclusion, HAV‐IA was the only subgenotype identified in acute symptomatic cases during the outbreak. The percentage of HAV‐specific IgM‐positive cases was very high among acute symptomatic students, but that was also high among asymptomatic students, which might contribute as the important source of infection during the outbreak. [ABSTRACT FROM AUTHOR]
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- 2019
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32. Analysis of hepatitis B virus genotype and gene mutation in patients with advanced liver disease in East Kalimantan, Indonesia.
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Wahyuni, Rury Mega, Utsumi, Takako, Juniastuti, Yano, Yoshihiko, Murti, Ignatia Sinta, Amin, Mochamad, Yamani, Laura Navika, Istimagfiroh, Anittaqwa, Purwono, Priyo Budi, Soetjipto, Lusida, Maria Inge, and Hayashi, Yoshitake
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CHRONIC hepatitis B ,HEPATITIS B virus ,HEPATITIS associated antigen ,LIVER diseases ,GENOTYPES ,VIRAL variation - Abstract
Liver cirrhosis (LC) and hepatocellular carcinoma (HCC) are life-threatening conditions frequently associated with chronic hepatitis B virus (HBV) infection in Asian countries, including Indonesia. HBV genotypes and several specific mutations are associated with disease progression. To clarify the geographical variation in viral characteristics, HBV genotypes and gene mutations were investigated in patients with advanced liver disease (ALD) in Samarinda, East Kalimantan, Indonesia. Sera were collected from 41 patients with ALD at Abdul Wahab Sjahranie Hospital and HBV carriers from Red Cross Center blood bank in Samarinda, and screened for hepatitis B surface antigen and hepatitis B e-antigen. Liver function data were obtained from the medical records from each patient. HBV genotype and gene mutations were determined by polymerase chain reaction sequencing. Analysis of HBV isolates indicated that genotype B was the most frequent genotype, at 85.4 and 97.8%, followed by C, at 14.6 and 2.2%, in patients with ALD and in HBV carriers, respectively. The C1505A mutation in X region, T1753V and A1762T/G1764A mutations in the basal core promoter region and C1858T in precore (PC) region were frequent and only detected in patients with ALD (28.9, 40, 73.5 and 17.6%, respectively), whereas the G1896A mutation in the PC region was frequently detected in HBV carriers. The presence of HBV genotype B and certain HBV gene mutations were characteristic of patients with ALD in East Kalimantan. [ABSTRACT FROM AUTHOR]
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- 2019
33. Protective effects of HLA-DPA1/DPB1 variants against Hepatitis B virus infection in an Indonesian population
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Wasityastuti, Widya, primary, Yano, Yoshihiko, additional, Ratnasari, Neneng, additional, Triyono, Teguh, additional, Triwikatmani, Catharina, additional, Indrarti, Fahmi, additional, Heriyanto, Didik Setyo, additional, Yamani, Laura Navika, additional, Liang, Yujiao, additional, Utsumi, Takako, additional, and Hayashi, Yoshitake, additional
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- 2016
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34. THE PRELIMINARY STUDY OF ANTIOXIDANT ACTIVITY FROM XYLO-OLIGOSACCHARIDE OF CORNCOB (ZEA MAYS) HYDROLYSIS PRODUCT WITH ENDO-β-XYLANASE ENZYME
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Yamani, Laura Navika, primary, Kristanti, Alfinda Novi, additional, and Puspaningsih, Ni Nyoman, additional
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- 2016
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35. A Deep-Sequencing Method Detects Drug-Resistant Mutations in the Hepatitis B Virus in Indonesians.
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Widasari, Dewiyani Indah, Yano, Yoshihiko, Heriyanto, Didik Setyo, Utsumi, Takako, Yamani, Laura Navika, Rinonce, Hanggoro Tri, Wasityastuti, Widya, Lusida, Maria Inge, Soetjipto, Okada, Rina, Murakami, Yoshiki, Tanahashi, Toshihito, azuma, Takeshi, and Hayashi, Yoshitake
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HEPATITIS B virus ,GENETIC mutation ,DRUG resistance in microorganisms ,HEPATITIS B treatment ,DRUG administration ,NUCLEOSIDES ,THERAPEUTICS - Abstract
Objective: The long-term administration of a nucleos(t)ide analogue (NA) for the treatment of chronic hepatitis B may encourage the emergence of viral mutations associated with drug resistance. Minor populations of viruses may exist before treatment, but are difficult to detect because of technological limitations. Identifying minor viral quasispecies should be useful in the clinical management of hepatitis B virus (HBV) infection. Methods: Six treatment-naïve Indonesian patients with chronic HBV infection participated in this study. The polymerase region of the HBV genome, including regions with known drug-resistant mutations, was subjected to capillary sequencing and MiSeq sequencing (Illumina). Mutations were analyzed with Genomics Workbench software version 6.0.1 (CLC bio). Results: The mean mapping reads for the six samples was 745,654, and the mean number of amplified fragments ranged from 17,926 to 25,336 DNA reads. Several known drug-resistant mutations in the reverse transcriptase region were identified in all patients, although the frequencies were low (0.12-1.06%). The proportions of the total number of reads containing mutations I169L/M, S202R, M204I/L or N236S were >1.0%. Conclusion: Several known NA-resistant mutations were detected in treatment-naïve patients in Indonesia using deep sequencing. Careful management of such patients is essential to prevent drug-resistant mutations from spreading to other patients. © 2014 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]
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- 2014
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36. Ultradeep Sequencing for Detection of Quasispecies Variants in the Major Hydrophilic Region of Hepatitis B Virus in Indonesian Patients
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Yamani, Laura Navika, Yano, Yoshihiko, Utsumi, Takako, Juniastuti, Wandono, Hadi, Widjanarko, Doddy, Triantanoe, Ari, Wasityastuti, Widya, Liang, Yujiao, Okada, Rina, Tanahashi, Toshihito, Murakami, Yoshiki, Azuma, Takeshi, Soetjipto, Lusida, Maria Inge, and Hayashi, Yoshitake
- Abstract
ABSTRACTQuasispecies of hepatitis B virus (HBV) with variations in the major hydrophilic region (MHR) of the HBV surface antigen (HBsAg) can evolve during infection, allowing HBV to evade neutralizing antibodies. These escape variants may contribute to chronic infections. In this study, we looked for MHR variants in HBV quasispecies using ultradeep sequencing and evaluated the relationship between these variants and clinical manifestations in infected patients. We enrolled 30 Indonesian patients with hepatitis B infection (11 with chronic hepatitis and 19 with advanced liver disease). The most common subgenotype/subtype of HBV was B3/adw (97%). The HBsAg titer was lower in patients with advanced liver disease than that in patients with chronic hepatitis. The MHR variants were grouped based on the percentage of the viral population affected: major, =20% of the total population; intermediate, 5% to <20%; and minor, 1% to <5%. The rates of MHR variation that were present in the major and intermediate viral population were significantly greater in patients with advanced liver disease than those in chronic patients. The most frequent MHR variants related to immune evasion in the major and intermediate populations were P120Q/T, T123A, P127T, Q129H/R, M133L/T, and G145R. The major population of MHR variants causing impaired of HBsAg secretion (e.g., G119R, Q129R, T140I, and G145R) was detected only in advanced liver disease patients. This is the first study to use ultradeep sequencing for the detection of MHR variants of HBV quasispecies in Indonesian patients. We found that a greater number of MHR variations was related to disease severity and reduced likelihood of HBsAg titer.
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- 2015
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37. IDENTIFICATION OF NON-TYPHOIDAL SALMONELLA FROM DIARRHEAL PEDIATRIC PATIENTS IN SURABAYA, INDONESIA.
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Juniastuti, Athiyyah, Alpha Fardah, Darma, Andy, Yamani, Laura Navika, Ferandra, Virginia Ayu, Fajar, Nur Syamsiyatul, Hariyono, Sugeng, Amin, Mochamad, Utsumi, Takako, Ranuh, Reza, Sudarmo, Subijanto M., and Lusida, Maria Inge
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- 2019
38. Equine-like G3 rotavirus strains as predominant strains among children in Indonesia in 2015–2016.
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Utsumi, Takako, Wahyuni, Rury Mega, Doan, Yen Hai, Dinana, Zayyin, Soegijanto, Soegeng, Fujii, Yoshiki, Juniastuti, null, Yamani, Laura Navika, Matsui, Chieko, Deng, Lin, Abe, Takayuki, Soetjipto, null, Lusida, Maria Inge, Ishii, Koji, Shimizu, Hiroyuki, Katayama, Kazuhiko, and Shoji, Ikuo
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- *
ROTAVIRUS diseases , *JUVENILE diseases , *CHILDREN , *POLYACRYLAMIDE gel electrophoresis , *PHYLOGENETIC models - Abstract
Rotavirus A (RVA) is a major cause of acute gastroenteritis in humans and animals worldwide. As a result of the segmented nature of the rotavirus genome, genetic reassortment commonly occurs. This study aims to clarify the genetic characteristics of RVAs circulating in Indonesia. From June 2015 through August 2016, stool samples were collected from 134 children aged <5 years (71 male and 63 female) with acute gastroenteritis who were inpatients at a private hospital in Surabaya, Indonesia. All stool samples were screened for RVA antigen using immunochromatography. Forty-two samples (31.3%, 42/134) were RVA antigen-positive. All RVA positive samples tested showed the unusual combinations of G3P[8] ( n = 36) and G3P[6] ( n = 3) with a short RNA pattern by G/P typing and polyacrylamide gel electrophoresis (PAGE). Whole genome analysis by next-generation sequencing (NGS) was performed for 11 strains to determine the RVA genotypes. Eleven rotavirus strains were found to carry a DS-like genetic backbone; nine strains showed a G3-P[8]-I2-R2-C2-M2-A2-N2-T2-E2-H2 genome constellation, which was recently reported in Australia, Hungary, Spain and Brazil; as well, two strains showed a G3-P[6]-I2-R2-C2-M2-A2-N2-T2-E2-H2 genome constellation. The phylogenetic tree based on the VP7 gene showed that all 11 strains were classified as equine-like G3, which is genetically distinct and different in origin from typical human G3 strains. The phylogenetic tree based on the NSP4 gene showed that six strains were classified as bovine-like strain and the remaining five were classified as human strain. In conclusion, we identified the strains which are intergenogroup reassortants containing an equine-like G3 VP7, a P[8])/P[6] VP4, with a DS-1-like genetic backbone. These findings suggest that equine-like G3P[8] and P[6] RVA strains have been circulating in the Indonesian population for at least 1 year and probably longer, indicating a diversity of RVAs in this area. [ABSTRACT FROM AUTHOR]
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- 2018
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39. Occurrence of norovirus infection in an asymptomatic population in Indonesia.
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Utsumi, Takako, Lusida, Maria Inge, Dinana, Zayyin, Wahyuni, Rury Mega, Yamani, Laura Navika, Juniastuti, null, Soetjipto, null, Matsui, Chieko, Deng, Lin, Abe, Takayuki, Doan, Yen Hai, Fujii, Yoshiki, Kimura, Hirokazu, Katayama, Kazuhiko, and Shoji, Ikuo
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- *
NOROVIRUS diseases , *GASTROENTERITIS , *EPIDEMIOLOGY , *VIRUS phylogeny , *POLYMERASE chain reaction - Abstract
Norovirus (NoV) is a major cause of nonbacterial acute gastroenteritis worldwide in all age groups, and asymptomatic individuals may contribute to NoV transmission as a reservoir. Nonetheless, little information is available regarding asymptomatic NoV infection in Indonesia. We performed an epidemiological analysis of NoV infection among asymptomatic healthy volunteers in the city of Surabaya, Indonesia (population ~ 2.75 million). A total of 512 stool samples from 18 individuals (age range 20–42 years) collected from July 2015 to June 2016 were examined. The detection of NoV and the genotype classification were carried out by a reverse transcription-polymerase chain reaction (RT-PCR) direct sequencing method. NoV was detected in 14 of the 512 stool samples (2.7%), with 7 individuals (38.9%) having at least 1 positive stool sample. All 14 of the NoV strains detected belonged to genogroup GII. The phylogenetic analysis indicated that 10 strains (71.4%) were grouped with GII.2, 2 (14.3%) were GII.17, 1 was GII.4 Sydney 2012, and 1 was GII.1. The circulation of GII.Pg/GII.1 and GII.Pe/GII.4 Sydney 2012 recombinant variants was detected among an asymptomatic population in Surabaya, Indonesia. Of the 7 positive individuals, 2 were repeatedly infected with the same strain and heterogenous strains. Taken together, our results suggest that the excretion of NoV from healthy individuals is one of the sources of NoV outbreak. [ABSTRACT FROM AUTHOR]
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- 2017
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40. Molecular epidemiology and genetic diversity of norovirus infection in children hospitalized with acute gastroenteritis in East Java, Indonesia in 2015–2019.
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Utsumi, Takako, Lusida, Maria Inge, Dinana, Zayyin, Wahyuni, Rury Mega, Soegijanto, Soegeng, Soetjipto, Athiyyah, Alpha Fardah, Sudarmo, Subijanto Marto, Ranuh, Reza Gunadi, Darma, Andy, Juniastuti, Yamani, Laura Navika, Doan, Yen Hai, Shimizu, Hiroyuki, Ishii, Koji, Matsui, Chieko, Deng, Lin, Abe, Takayuki, Katayama, Kazuhiko, and Shoji, Ikuo
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- *
NOROVIRUS diseases , *GENETIC epidemiology , *HOSPITAL care of children , *MOLECULAR epidemiology , *RNA replicase , *GASTROENTERITIS - Abstract
Noroviruses are recognized as a leading cause of outbreaks and sporadic cases of acute gastroenteritis (AGE) among individuals of all ages worldwide, especially in children <5 years old. We investigated the epidemiology of noroviruses among hospitalized children at two hospitals in East Java, Indonesia. Stool samples were collected from 966 children with AGE during September 2015–July 2019. All samples were analyzed by reverse transcription-polymerase chain reaction (RT-PCR) for the amplification of both the RNA-dependent RNA polymerase (RdRp) and the capsid genes of noroviruses. The genotypes were determined by phylogenetic analyses. In 2015–2019, noroviruses were detected in 12.3% (119/966) of the samples. Children <2 years old showed a significantly higher prevalence than those ≥2 years old (P = 0.01). NoV infections were observed throughout the year, with the highest prevalence in December. Based on our genetic analyses of RdRp, GII.[P31] (43.7%, 31/71) was the most prevalent RdRp genotype, followed by GII.[P16] (36.6%, 26/71). GII.[P31] was a dominant genotype in 2016 and 2018, whereas GII.[P16] was a dominant genotype in 2015 and 2017. Among the capsid genotypes, the most predominant norovirus genotype from 2015 to 2018 was GII.4 Sydney_2012 (33.6%, 40/119). The most prevalent genotype in each year was GII.13 in 2015, GII.4 Sydney_2012 in 2016 and 2018, and GII.3 in 2017. Based on the genetic analyses of RdRp and capsid sequences, the strains were clustered into 13 RdRp/capsid genotypes; 12 of them were discordant, e.g., GII.4 Sydney[P31], GII.3[P16], and GII.13[P16]. The predominant genotype in each year was GII.13[P16] in 2015, GII.4 Sydney[P31] in 2016, GII.3[P16] in 2017, and GII.4 Sydney[P31] in 2018. Our results demonstrate high detection rates and genetic diversity of norovirus GII genotypes in pediatric AGE samples from Indonesia. These findings strengthen the importance of the continuous molecular surveillance of emerging norovirus strains. • Noroviruses were detected in 12.3% (119/966) of the samples during 2015–2019. • GII.[P16] was dominant in 2015 and 2017 but GII.[P31] was in 2016 and 2018. • GII.13 was dominant in 2015, GII.4 Sydney_2012 in 2016 and 2018, and GII.3 in 2017. • The diversity of norovirus GII genotypes and rapid evolution in Indonesia is shown. [ABSTRACT FROM AUTHOR]
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- 2021
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41. Association Between HBx Variations and Development of Severe Liver Disease Among Indonesian Patients.
- Author
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Putri WA, Yano Y, Yamani LN, Lusida MI, Soetjipto, Liang Y, Mardian Y, Wasityastuti W, and Hayashi Y
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- Hepatitis B virus immunology, Humans, Immune Evasion, Viral Regulatory and Accessory Proteins, Liver Neoplasms etiology, Mutation, Trans-Activators genetics
- Abstract
Multi-site mutations in the hepatitis B virus (HBV) X gene are often found in patients with advanced liver diseases such as liver cirrhosis and hepatocellular carcinoma. It has been reported that modifications in the X protein play crucial roles in the development of HBV-related severe liver disease. However, the prevalence of genetic variations in Indonesian strains has not been systematically assessed. In this study, we sought to investigate the profile of nonsynonymous mutations in the X gene. Overall, 114 Indonesian HBV strains, including 12 in-house samples, were retrieved from GenBank. The mutation frequency in the X gene was compared among strains obtained from patients with chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma. The mutation frequencies of the domain and basal core promoter regions were significantly greater in advanced liver diseases compared with chronic hepatitis. In addition, the double mutation K130M/V131I and the triple mutation N88V/K130M/V131I were associated with a 2.5 times higher risk of advanced liver disease. However, the roles of two novel X gene mutations (A12S/T and L16F/P) on hepatocarcinogenesis are unclear relative to wild-type X gene. In conclusion, the development of multi-site mutations in the X gene may represent a strategy by which HBV can escape immune surveillance and thus contribute to hepatocarcinogenesis, even though the biological roles of some variants remain unclear.
- Published
- 2019
42. Molecular Epidemiology and Clinical Features of Rotavirus Infection Among Pediatric Patients in East Java, Indonesia During 2015-2018: Dynamic Changes in Rotavirus Genotypes From Equine-Like G3 to Typical Human G1/G3.
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Athiyyah AF, Utsumi T, Wahyuni RM, Dinana Z, Yamani LN, Soetjipto, Sudarmo SM, Ranuh RG, Darma A, Juniastuti, Raharjo D, Matsui C, Deng L, Abe T, Doan YH, Fujii Y, Shimizu H, Katayama K, Lusida MI, and Shoji I
- Abstract
Group A rotavirus (RVA) is the most important cause of severe gastroenteritis among children worldwide, and effective RVA vaccines have been introduced in many countries. Here we performed a molecular epidemiological analysis of RVA infection among pediatric patients in East Java, Indonesia, during 2015-2018. A total of 432 stool samples were collected from hospitalized pediatric patients with acute gastroenteritis. None of the patients in this cohort had been immunized with an RVA vaccine. The overall prevalence of RVA infection was 31.7% (137/432), and RVA infection was significantly more prevalent in the 6- to 11-month age group than in the other age groups ( P < 0.05). Multiplex reverse transcription-PCR (RT-PCR) revealed that the most common G-P combination was equine-like G3P[8] (70.8%), followed by equine-like G3P[6] (12.4%), human G1P[8] (8.8%), G3P[6] (1.5%), and G1P[6] (0.7%). Interestingly, the equine-like strains were exclusively detected until May 2017, but in July 2017 they were completely replaced by a typical human genotype (G1 and G3), suggesting that the dynamic changes in RVA genotypes from equine-like G3 to typical human G1/G3 in Indonesia can occur even in the country with low RVA vaccine coverage rate. The mechanism of the dynamic changes in RVA genotypes needs to be explored. Infants and children with RVA-associated gastroenteritis presented more frequently with some dehydration, vomiting, and watery diarrhea, indicating a greater severity of RVA infection compared to those with non-RVA gastroenteritis. In conclusion, a dynamic change was found in the RVA genotype from equine-like G3 to a typical human genotype. Since severe cases of RVA infection were prevalent, especially in children aged 6 to 11 months or more generally in those less than 2 years old, RVA vaccination should be included in Indonesia's national immunization program.
- Published
- 2019
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43. Profile of Mutations in the Reverse Transcriptase and Overlapping Surface Genes of Hepatitis B Virus (HBV) in Treatment-Naïve Indonesian HBV Carriers.
- Author
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Yamani LN, Yano Y, Utsumi T, Wasityastuti W, Rinonce HT, Widasari DI, Juniastuti, Lusida MI, Soetjipto, and Hayashi Y
- Subjects
- Amino Acid Substitution, DNA Mutational Analysis, Genome, Viral, Genotype, Hepatitis B Surface Antigens genetics, Hepatitis B virus classification, Hepatitis B virus enzymology, Humans, Indonesia epidemiology, Phylogeography, Prevalence, Carrier State, Drug Resistance, Viral, Hepatitis B epidemiology, Hepatitis B virology, Hepatitis B virus genetics, Mutation, RNA-Directed DNA Polymerase genetics
- Abstract
Mutations in the reverse transcriptase (RT) region of the hepatitis B virus (HBV) genome are an important factor in low therapeutic effectiveness. Nonetheless, the prevalence of these mutations in HBV strains isolated previously in Indonesia has not been systematically examined. Therefore, in this study, we investigated the profile of mutations in the RT region and the associations of these mutations with amino acid changes in the surface protein in the virus of treatment-naïve Indonesian HBV carriers. Overall, 96 sequences of the full-length Indonesian HBV genomes (genotype B, n = 54; genotype C, n = 42) were retrieved from the National Center for Biotechnology Information. Naturally occurring primary and/or compensatory drug resistance mutations were found in 6/54 (11.1%) genotype B strains and in 1/42 (2.4%) genotype C strains. The potential mutations underlying resistance to a nucleos(t)ide analog and/or pretreatment mutations were more frequent in both genotypes but more frequent in genotype C strains than in genotype B strains. The A-B interdomain region in the RT gene was more frequently mutated in genotype C than in genotype B (3.51 ± 2.53 vs. 1.08 ± 1.52, P < 0.001). Knowledge about the mutational profiles of the RT gene and changes in the surface protein may help clinicians to select the most appropriate antiviral drug and vaccination or HBV immunoglobulin regimen for management of HBV infection in Indonesia.
- Published
- 2017
- Full Text
- View/download PDF
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