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Published on: January 28, 2019
Molecular Characterization of Rotavirus From Under-Five Children Presenting With Diarrhea at a Tertiary Hospital in
Kellu Bukar Ali1, Yahaya Yaqub2, Mairo Usman Kadaura3
1Department of Medical Microbiology, University of Maiduguri, Maiduguri, Borno State, Nigeria, unimaid.edu.ng.
Insights
Rotavirus gastroenteritis (RVGE) is prevalent in Nigerian children under 5, with G9P[6] being the most common genotype. Evaluating rotavirus vaccine efficacy is crucial to reduce childhood deaths from this diarrheal disease.
Area of Science:
- Pediatrics
- Virology
- Public Health
Background:
- Diarrhea poses a significant threat to child health in developing nations.
- Rotavirus is a primary cause of severe, potentially fatal, acute watery diarrhea in young children.
- Understanding rotavirus gastroenteritis (RVGE) prevalence and genotypes is vital for effective control.
Purpose of the Study:
- To determine the prevalence of rotavirus gastroenteritis (RVGE) in children under five years of age.
- To characterize the circulating rotavirus genotypes (G and P types) in the study population.
- To inform public health strategies and vaccine efficacy evaluations in Nigeria.
Main Methods:
- A cross-sectional study involving 173 children with acute diarrhea was conducted.
- Stool samples were screened for rotavirus antigen using lateral flow immunochromatography.
- VP7 (G type) and VP4 (P type) genotypes were identified using reverse transcription-polymerase chain reaction (RT-PCR).
Main Results:
- Rotavirus prevalence was 28% by immunochromatography and 14.5% by RT-PCR.
- Identified G types included G1, G2, G1G2, G9, G12, and G nontypeable (G NT).
- Identified P types included P4, P6, and P8, with G9P[6] being the most frequent genotype combination (28%).
Conclusions:
- A high prevalence of RVGE was observed in Northeast Nigeria.
- The study identified key circulating rotavirus genotypes, including G9P[6].
- Evaluating the efficacy of the current rotavirus vaccine (ROTAVAC) is recommended to decrease RVGE-associated mortality.
Background:
Diarrhea is a leading cause of morbidity and mortality among children in developing countries. Rotavirus is a significant cause of acute watery diarrhea in children under 5 years of age, which can be fatal. This study is aimed at investigating the prevalence of rotavirus gastroenteritis (RVGE) in children and characterizing the prevalent circulating genotypes.
Material And Methods:
A cross-sectional study was conducted, enrolling 173 children under the age of 5 years who presented with acute diarrhea lasting less than 2 weeks at the University of Maiduguri Teaching Hospital between 2017 and 2018. Stool samples were collected and screened for rotavirus antigen using the lateral flow immunochromatographic method. Stool samples that screened positive were further investigated for VP7 (i.e., G type) and VP4 (i.e., P type) rotavirus genotypes using reverse transcription-polymerase chain reaction (RT-PCR).
Results:
The prevalence was determined to be 28% by the immunochromatographic method and 14.5% by RT-PCR (N = 173). The identified G types included G1, G2, G1G2, G9, G12, and G NT (G nontypeable), whereas the P types identified were P4, P6, and P8. The most frequently observed rotavirus genotype combination was G9P[6] 7 (28%), while mixed genotype infection with unusual strain G1G2P[4, 6, 8] 1 (4%) was also detected.
Conclusion:
This study reported a high prevalence of RVGE in the northeast region of Nigeria. As the current ROTAVAC in use in routine immunization in Nigeria comes to its third year, it is necessary to evaluate the vaccine efficacy so as to reduce the deaths associated with RVGE in Nigeria.
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