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Sameer M, Masood A, Almutawea L, Fox G, Loni R, Ahmed A, Ben Turkia H, Abdulsamad M, Mary I. Gastrointestinal Panel Performance for the Diagnosis of Acute Gastroenteritis in Pediatric Patients. Cureus 2024; 16:e61979. [PMID: 38983994 PMCID: PMC11231452 DOI: 10.7759/cureus.61979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2024] [Indexed: 07/11/2024] Open
Abstract
BACKGROUND Various methods are used to identify the causative organisms of acute gastroenteritis (AGE) in children. The gastrointestinal (GI) panel has the potential to detect up to 22 pathogens rapidly through the multiplex real-time PCR test. We studied the impact of the GI panel on clinical management in the pediatric population. METHODS A retrospective study was conducted to collect data on GI panel results and clinical details of inpatient children presenting with AGE at King Hamad University Hospital, Kingdom of Bahrain, over the course of one year. RESULTS One hundred nine samples were collected. The GI panel was positive in 96 samples (88.1%), with the majority detected in the toddler age group. Forty-one (42.7%) samples were positive for at least one organism. Salmonella was the most frequently encountered bacteria as a single isolate, 10/55 (18.2%), while enteropathogenic Escherichia coli was the most common co-infected organism, 16/41 (39%). Norovirus was the most common virus among the viruses. Bacterial detection peaked from July to October, while viral detection plateaued throughout the year. The GI panel and stool culture were positive for the same organism in 17 samples, versus one sample with a different organism. Sixty-two (56.9%) samples had a positive GI panel but negative stool cultures and stool analysis, and half of those detected viruses. The GI panel was positive in 86.2% of severely ill patients; the majority were bacteria. Bacterial detection was associated with a higher CRP compared to viruses. CONCLUSION The GI panel is an informative tool for detecting the causative pathogen of AGE in children. However, it can detect multiple organisms, indicating a possible carrier status, which points toward future studies.
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Affiliation(s)
- Marwa Sameer
- Pediatric and Neonatology Department, King Hamad University Hospital, Muharraq, BHR
| | - Abdulrahman Masood
- Cardiology Department, Mohammed Bin Khalifa Bin Salman Al Khalifa Specialist Cardiac Center, Riffa, BHR
| | - Lateefa Almutawea
- Pediatric and Neonatology Department, King Hamad University Hospital, Muharraq, BHR
| | - Gabriel Fox
- Pediatric and Neonatology Department, King Hamad University Hospital, Muharraq, BHR
| | - Ramaning Loni
- Pediatric and Neonatology Department, King Hamad University Hospital, Muharraq, BHR
| | - Amira Ahmed
- Pathology, Blood Bank, and Laboratory Medicine Department, King Hamad University Hospital, Muharraq, BHR
| | - Hadhami Ben Turkia
- Pediatric and Neonatology Department, King Hamad University Hospital, Muharraq, BHR
| | - Maryam Abdulsamad
- Pathology, Blood Bank, and Laboratory Medicine Department, King Hamad University Hospital, Muharraq, BHR
| | - Imelda Mary
- Pediatric and Neonatology Department, King Hamad University Hospital, Muharraq, BHR
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Nour I, Hanif A, Alanazi IO, Al-Ashkar I, Alhetheel A, Eifan S. Novel insights of waterborne human rotavirus A in Riyadh (Saudi Arabia) involving G2 predominance and emergence of a thermotolerant sequence. Sci Rep 2021; 11:12132. [PMID: 34108565 PMCID: PMC8190275 DOI: 10.1038/s41598-021-91607-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 05/28/2021] [Indexed: 02/05/2023] Open
Abstract
The routine evaluation of water environments is necessary to manage enteric virus-mediated fecal contamination and the possible emergence of novel variants. Here, we detected human rotavirus A (HRVA) circulating in two wastewater treatment plants, two lakes, irrigation water and a wastewater landfill located in Riyadh. VP7-derived surface protein sequences were assessed by phylogenetic analyses and inspection of thermotolerance-mediated secondary structure and seasonal variation. HRVA was most prevalent at An-Nazim wastewater landfill (AN-WWLF; 63.89%). Phylogenetic analyzes revealed the predominance of HRVA G2 lineage for the first time in Saudi Arabia. Moreover, a single HRVA sequence (2B64I-ANLF3/2018) was recovered at 45 °C from AN-WWLF; secondary structure prediction indicated that this sequence was thermotolerant with a high hydrophobicity, an absence of Ramachandran outliers, and a higher content of proline patches on the protein surface. Varied relationships were significantly observed between sampling areas influenced by temperature ranges (p < 0.05). HRVA prevalence was influenced by seasonal variations, favoring moderate temperatures in late autumn and early winter in all locations. However, a significant temperature impact was detected in Wadi-Hanifah Lake (p = 0.01). Our study extends the knowledge of currently circulating HRVA genotypes, and indicates the probable emergence of thermotolerant strains and seasonally mediated HRVA prevalence.
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Affiliation(s)
- Islam Nour
- grid.56302.320000 0004 1773 5396Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Atif Hanif
- grid.56302.320000 0004 1773 5396Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ibrahim O. Alanazi
- grid.452562.20000 0000 8808 6435National Center for Biotechnology, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Ibrahim Al-Ashkar
- grid.56302.320000 0004 1773 5396Biotechnology Laboratory, Plant Production Department, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia ,grid.411303.40000 0001 2155 6022Agronomy Department, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
| | - Abdulkarim Alhetheel
- grid.56302.320000 0004 1773 5396Department of Pathology and Laboratory Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Saleh Eifan
- grid.56302.320000 0004 1773 5396Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
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Epidemiological, molecular, and clinical features of rotavirus infections among pediatrics in Qatar. Eur J Clin Microbiol Infect Dis 2021; 40:1177-1190. [PMID: 33411172 DOI: 10.1007/s10096-020-04108-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 11/20/2020] [Indexed: 12/16/2022]
Abstract
Acute gastroenteritis (AGE) remains a major cause of diarrhea in developing and developed countries. Rotavirus (RV) is a leading cause of severe pediatric diarrhea worldwide. Here we report on the prevalence of circulating genotypes in association with demographics and clinical manifestations outcomes in Qatar. A total of 231 RV-positive fecal samples were collected from children suffering from AGE during 3 years study period between June 2016 and June 2019. The age of the subjects ranged between 2 months and 14 years (median of 16 months). The VP4 and VP7 were amplified and sequenced. Phylogenetic analyses were performed using MEGA7.0. Pearson's chi-squared test was used to determine significant differences for comparisons of general categorical variables. RV infections were most common in children between 1 and 3 years of age (49%), followed by those < 1 year and > 3 years of age (33% and 28%, respectively). RV infections were more frequent in males than females, with a ratio of 1.4:1. RV infections occurred throughout the year, with a noticeable increase in summer (42.8%) and a drop in winter (20.1%). RV genotypes G3P[8] (30.8%), G2P[8] (12.3%), G4P[8] (11.7%), and G1P[8] (10.4%) were the common genotypes during the study period. The G3P[8] strain detected in our study revealed similarities to the equine-like G3P[8] (10.3%; 24/231) (KT988229.1), Wa-like genomic constellation (9%; 21/231) (MF563894.1), and DS-1-like strains (6.4%; 15/231) (LC386081.1). Based on the Vesikari score system, severe clinical illness including diarrhea and vomiting (average frequency: 4 to 5 times/day) was recorded for G3P[8] group, followed by G9P[8], G4P[8], and G1P[8]. Higher incidence for G3P[8], G2P[8], G4P[8], and G1P[8] were reported in Qatari subjects compared to other nationalities. The multinational status of a small country explains the wide diversity of circulating RV genotypes in Qatar. The highest prevalence and severe illnesses were recorded to G3P[8], which is different from other surrounding countries/global levels.
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Badur S, Öztürk S, Pereira P, AbdelGhany M, Khalaf M, Lagoubi Y, Ozudogru O, Hanif K, Saha D. Systematic review of the rotavirus infection burden in the WHO-EMRO region. Hum Vaccin Immunother 2019; 15:2754-2768. [PMID: 30964372 PMCID: PMC6930073 DOI: 10.1080/21645515.2019.1603984] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Rotavirus gastroenteritis imposes a heavy burden on low- and middle-income countries. The World Health Organization defines the Eastern Mediterranean region (WHO-EMRO) as a diverse area in terms of socioeconomic status and health indicators. Rotavirus vaccination has been introduced, at least partially, in 19 out of the 22 EM countries; however, vaccine coverage remains low, and data on rotavirus disease burden is scarce.Available data on rotavirus prevalence, seasonality, vaccination status, and genotype evolution was systematically compiled following a literature review that identified 165 relevant WHO-EMRO epidemiology studies published between 1990 and 2017.Although the infectious agents responsible for acute gastroenteritis vary over time, rotavirus remained the leading cause of acute gastroenteritis in children, as seen in 76.3% of reviewed publications. Younger children (<2 years old) were at higher risk and thus increased vaccination coverage and surveillance systems are required to reduce the rotavirus gastroenteritis burden in WHO-EMRO countries.
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Affiliation(s)
- Selim Badur
- MENA, Medical & Clinical Emerging Markets, GSK, Istanbul, Turkey
| | - Serdar Öztürk
- MENA, Medical & Clinical Emerging Markets, GSK, Istanbul, Turkey
| | - Priya Pereira
- Global Medical Affairs Rota/MMRV, GSK, Wavre, Belgium
| | | | - Mansour Khalaf
- EM Central Vaccines Medical/Clinical, GSK, Jeddah, Saudi Arabia
| | - Youness Lagoubi
- EM Central Vaccines Medical/Clinical, GSK, Casablanca, Morocco
| | - Onur Ozudogru
- EM Central Vaccines Medical/Clinical, GSK, Dubai, United Arab Emirates
| | - Kashif Hanif
- EM Central Vaccines Medical/Clinical, GSK, Karachi, Pakistan
| | - Debasish Saha
- Epidemiology/Health Economics EM, GSK, Wavre, Belgium
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Almalki SSR. Circulating rotavirus G and P strains post rotavirus vaccination in Eastern Mediterranean Region. Saudi Med J 2018; 39:755-766. [PMID: 30106412 DOI: 10.15537/smj.2018.8.21394] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE To detect changes in circulating strains of rotavirus in the Eastern Mediterranean Region post rotavirus immunization drive. METHODS We searched MEDLINE, PubMed, ScienceDirect, and the Cochrane Library and specific database website (Nutrition and Food Sciences) for relevant articles. Our search included websites of a number of relevant organizations in addition to gray literature search. Of the 2198 articles found, we included only 35 studies after excluding irrelevant, ineligible, duplicated, and very low-quality papers. RESULTS Thirty pre-vaccination studies reported frequent rotavirus strains among children below 5 years of age. G1P[8] has been identified as the most dominant type prior to vaccination in Eastern Mediterranean Region (EMR) countries. Five post-vaccination studies conducted in 3 countries (Saudi Arabia, Morocco, and Yemen) illustrated that G1P[8] is the most prevalent strain in Saudi Arabia, and the incidence of G2P[4] has increased from 21.6% to 33.3%. In Yemen, G1P[4] is the most prevalent strain (87.5%), followed by G9P[8] (57%) and G1P[8] (18.5%). Furthermore, in Yemen, G9P[8] were the most prevalent strains accounting to 57% and 14% in G9P[4], post vaccination. Finally, in Morocco, G1P[8] was not reported 3 years post vaccination; however, incidence of G9P[8] was reported at 67% and G2P[4] at 33%. CONCLUSIONS Rotavirus circulating strain prevalence in EMR countries has changed post vaccination, and G9P[8], G2P[4], and G9P[4] have become more dominant. Proportion of rotavirus strains in these countries after vaccination has significantly reduced. There is an increase in circulating strain G2P[4] in the post-vaccination period, which needs further monitoring.
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Affiliation(s)
- Shaia S R Almalki
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Al Baha University, Kingdom of Saudi Arabia. E-mail.
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Foodborne disease and food control in the Gulf States. Food Control 2016; 73:341-366. [PMID: 32288324 PMCID: PMC7126945 DOI: 10.1016/j.foodcont.2016.08.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 08/09/2016] [Accepted: 08/12/2016] [Indexed: 12/04/2022]
Abstract
Gulf States in the Middle East have had to change rapidly from subsidence herding, farming and fishing communities to modern states through the exploitation of revenue-generating petroleum products. Fresh water is an even more precious commodity than oil today as this is seen as a rapidly diminishing resource through over use of aquifers with scarce and unpredictable rainfall not replenishing the needs of these countries which increasing rely on reverse-osmosis (RO) desalination of seawater but at a cost in terms of energy. Recycling of waste water and sewage is carried out and used to water urban landscaping and some crops, but there are risks of the presence of pathogens. Much food today is imported to satisfy the requirements of expanding populations, especially foreign workers on temporary visas who make up more than half the residents in many of these Gulf States. Despite limited published data on Gulf States regarding enteric and foodborne diseases and their prevention and control, profiles emerge that can describe the current situation and some future directions. Gastrointestinal diseases, such as typhoid, cholera, and amebic dysentery can be brought into these countries through workers returning from endemic regions, and also through refugees from conflict-torn neighboring countries. However, some diseases are endemic like brucellosis and fatal illnesses from the newly identified Middle East Respiratory Corona Virus (MERS-CoV) associated with camels. In the 1990s, coalition troops stationed during the Gulf War brought in external suppliers and caterers, but using local products like chickens with troops occasionally suffering from infections. The hot climate, particularly in summer, can allow rapid growth of pathogens in foods, especially where refrigeration is not available as in home-prepared lunches by workers and during transportation of foods across traffic-congested cities. One of the biggest concerns for Saudi Arabia is the health oversight of millions during the annual Hajj, and despite much care over restriction of infected pilgrims and care of food, occasional outbreaks have been reported. Government agencies are particularly concerned about restaurant food and try and follow up on complaints of customers but rarely are agents identified; those that have include Salmonella, Bacillus cereus and Staphylococcus aureus. Implicated foods include ethnic products such as Turkish menu items and shawarma. Local culture may play a role in allowing growth of pathogens such as serving women after men at weddings. However, deaths that have been attributed to microbial sources may have been caused by illegal use of pesticides such as aluminum phosphide. Severe penalties have been applied to owners and staff implicated in outbreaks including fines, jail sentences and deportations, which are not typical of Western nations. However, some agencies have initiatives to help educate and train foreign workers in several languages. Foodborne disease surveillance systems are generally not adequate though some countries have initiated modernization of inspection approaches and laboratories. Consumer surveys show that residents have some knowledge of foodborne disease but this could be improved especially for women who do most of the shopping and food preparation in homes. Agencies are increasing directing campaigns for general food safety in their populations, and as long as resources are available, food control is likely to improve over time in Gulf States which is good news for visitors, expatriate workers and citizens alike. Water availability, geographic and political overview of each of the Gulf States. Gastrointestinal and foodborne diseases affecting citizens and expatriate workers. Relevant research and government policies and actions to reduce foodborne disease.
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Khalil M, Azhar E, Kao M, Al-Kaiedi N, Alhani H, Al Olayan I, Pawinski R, Gopala K, Kandeil W, Anis S, Van Doorn LJ, DeAntonio R. Gastroenteritis attributable to rotavirus in hospitalized Saudi Arabian children in the period 2007-2008. Clin Epidemiol 2015; 7:129-37. [PMID: 25709500 PMCID: PMC4334312 DOI: 10.2147/clep.s69502] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Purpose Rotavirus (RV) is a leading cause of severe gastroenteritis (GE) in children across the world. As there is a lack of epidemiological data for RV gastroenteritis (RVGE) in Saudi Arabia, this hospital-based study was designed to estimate the disease burden of RVGE and assess the prevalent RV types in Saudi children younger than 5 years of age. Patients and methods Children hospitalized for acute GE were enrolled at four pediatric referral hospitals in Saudi Arabia. The study was conducted from February 2007 to March 2008 and used the World Health Organization’s generic protocol for RVGE surveillance. The Vesikari severity scale was used to assess the severity of RVGE. Stool samples were tested for RV using an enzyme-linked immunosorbent assay. Samples were further typed by reverse transcriptase–polymerase chain reaction and hybridization assay for determining the G and P types. Results A total of 1,007 children were enrolled; the final analysis included 970 children, of whom 395 were RV positive, 568 were RV negative, and seven had unknown RV status. The proportion of RVGE among GE hospitalizations was 40.7% (95% confidence interval: 37.6–43.9). The highest percentage of RVGE hospitalizations (83.1%) was seen in children younger than 2 years of age. The highest proportion of RV among GE hospitalizations was in June 2007 with 57.1%. The most common RV types detected were G1P[8] (49.3%), G1G9P[8] (13.2%), and G9P[8] (9.6%). Before hospitalization, severe GE episodes occurred in 88.1% RV-positive and 79.6% RV-negative children. Overall, 94% children had recovered by the time they were discharged. Two children (one RV positive and one RV negative) died due to GE complications. Conclusion RVGE is responsible for a high proportion of hospitalizations in Saudi children younger than 5 years of age. Routine RV vaccination has therefore been introduced into the national immunization program and may help reduce the morbidity, mortality, and disease burden associated with RVGE in Saudi Arabia.
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Affiliation(s)
- Mohamed Khalil
- Public Health and Research Development, Ministry of Health, Riyadh, Saudi Arabia
| | - Esam Azhar
- Medical Laboratory Technology Department, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia ; Special Infectious Agents Unit, Bio-Safety Level 3, King Fahad Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Moujahed Kao
- Special Infectious Agents Unit, Bio-Safety Level 3, King Fahad Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Noura Al-Kaiedi
- Special Infectious Agents Unit, Bio-Safety Level 3, King Fahad Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hatim Alhani
- Maternity and Children's Hospital, Dammam, Saudi Arabia
| | | | - Robert Pawinski
- Reckitt Benckiser Pharmaceuticals, Slough, UK ; GlaxoSmithKline Vaccines, Wavre, Belgium
| | - Kusuma Gopala
- GlaxoSmithKline Pharmaceuticals Ltd, Bangalore, Karnataka, India
| | | | - Sameh Anis
- GlaxoSmithKline Vaccines, Wavre, Belgium ; AbbVie Biopharmaceuticals GmbH, Dubai, United Arab Emirates
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Review of global rotavirus strain prevalence data from six years post vaccine licensure surveillance: is there evidence of strain selection from vaccine pressure? INFECTION GENETICS AND EVOLUTION 2014; 28:446-61. [PMID: 25224179 DOI: 10.1016/j.meegid.2014.08.017] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/13/2014] [Accepted: 08/14/2014] [Indexed: 11/23/2022]
Abstract
Comprehensive reviews of pre licensure rotavirus strain prevalence data indicated the global importance of six rotavirus genotypes, G1P[8], G2P[4], G3P[8], G4P[8], G9P[8] and G12P[8]. Since 2006, two vaccines, the monovalent Rotarix (RV1) and the pentavalent RotaTeq (RV5) have been available in over 100 countries worldwide. Of these, 60 countries have already introduced either RV1 or RV5 in their national immunization programs. Post licensure vaccine effectiveness is closely monitored worldwide. This review aimed at describing the global changes in rotavirus strain prevalence over time. The genotype distribution of the nearly 47,000 strains that were characterized during 2007-2012 showed similar picture to that seen in the preceding period. An intriguing finding was the transient predominance of heterotypic strains, mainly in countries using RV1. Unusual and novel antigen combinations continue to emerge, including some causing local outbreaks, even in vaccinated populations. In addition, vaccine strains have been found in both vaccinated infants and their contacts and there is evidence for genetic interaction between vaccine and wild-type strains. In conclusion, the post-vaccine introduction strain prevalence data do not show any consistent pattern indicative of selection pressure resulting from vaccine use, although the increased detection rate of heterotypic G2P[4] strains in some countries following RV1 vaccination is unusual and this issue requires further monitoring.
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Anochie PI, Onyeneke EC, Asowata EO, Afocha E, Onyeozirila AC, Ogu AC, Onyeneke BC. The role of rotavirus associated with pediatric gastroenteritis in a general hospital in Lagos, Nigeria. Germs 2013; 3:81-9. [PMID: 24432291 DOI: 10.11599/germs.2013.1041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 09/01/2013] [Indexed: 11/23/2022]
Abstract
INTRODUCTION Bacterial, viral and parasitic agents have been implicated and confirmed as causative agents of gastroenteritis in children with ages below 5 years old. The major role of rotavirus as causative agent is not widely recognized within the public health community, particularly in developing countries. This study examined the role of rotavirus as a causative agent of childhood gastroenteritis in infants and young children below 5 years of age in a General Hospital in Lagos, Nigeria. METHODS Parents and caregivers of children admitted to the hospital were interviewed using a structured questionnaire. Viral RNA was extracted from the stool samples collected and analyzed using RT-PCR for genotyping and agarose gel electrophoresis for identification of rotavirus electrophoretypes. RESULTS Out of the 71 samples analyzed, 16 (22.5%) were positive for rotavirus. A total of 12 (75%) males and 4 (25%) females were positive for rotavirus gastroenteritis with most cases (7, 43.8%) distributed to the 13-24 months age group, followed closely by the 1-6 months age group, with 6 cases, 37.5%. Rotavirus G2 genotype was the most prevalent strain in the hospital (10 patients, 62.5%) followed by G1 (6 patients, 37.5%). These were the only rotavirus genotypes detected in the hospital.
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Affiliation(s)
| | - Edwina Chinwe Onyeneke
- MD, St. Joseph's Hospital, Department of Medicine and Surgery, Enyiogugu Aboh Mbaise Local Government Area, Owerri, Imo state, Nigeria
| | - Emmanuel Osaretin Asowata
- MD, Virology Research Laboratory, University of Lagos, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
| | - Ebelechukwu Afocha
- MD, Microbiology, Nigerian Institute of Medical Research Yaba, Lagos, Nigeria
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