Genetic Characteristics of Rotavirus Acute Gastroenteritis Among Hospitalized Children of Odisha in Eastern India
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Published on: January 28, 2019
Subal Kumar Pradhan1, Sumanta Panigrahi2, Pooja Sagar Padhi3
1Department of Pediatrics, Sardar Vallabhbhai Patel Post Graduate Institute of Paediatrics (SVPPGIP) and SCB Medical College, Cuttack, Odisha, India. drsubal@rediffmail.com.
Insights
Rotavirus diarrhea is common in hospitalized children under five, with G3P[8] and G1P[8] genotypes prevalent post-vaccine introduction. Continued surveillance is vital to monitor vaccine impact and evolving rotavirus strains.
Area of Science:
- Pediatric infectious diseases
- Virology
- Vaccinology
Background:
- Rotavirus is a leading cause of severe diarrheal disease in young children globally.
- The introduction of rotavirus vaccine into the Universal Immunization Program (UIP) aimed to reduce disease burden.
- Understanding circulating strains post-vaccination is crucial for assessing vaccine effectiveness and public health strategies.
Purpose of the Study:
- To determine the epidemiological patterns of rotavirus diarrhea in hospitalized children under five years of age.
- To identify and characterize the prevalent rotavirus genotypes following the vaccine's introduction in the UIP.
- To provide data for ongoing rotavirus vaccine surveillance and policy.
Main Methods:
- A prospective study was conducted from April 2016 to July 2019.
- Stool samples from hospitalized children under five with acute gastroenteritis were tested for rotavirus using enzyme immunoassay.
- Rotavirus strains were genotyped using reverse-transcription polymerase chain reaction (PCR); data analyzed with chi-square tests.
Main Results:
- Rotavirus diarrhea was detected in 36.4% (715/1963) of tested samples.
- Peak incidence occurred during winter months (December-February) in children aged 6 months to 2 years.
- The most common genotypes were G3P[8] (50.34%) and G1P[8] (17.46%).
Conclusions:
- The high prevalence of rotavirus diarrhea underscores the continued importance of rotavirus vaccination.
- Observed changes in genotype distribution highlight the need for sustained surveillance to monitor vaccine impact on strain evolution.
- Ongoing monitoring is essential for detecting new rotavirus genotypes and informing future vaccination strategies.
Objective:
To generate epidemiological data of rotavirus diarrhea among hospitalized children less than 5 y of age and to characterize the circulating rotavirus genotypes post introduction of rotavirus vaccine in Universal Immunization Program (UIP).
Methods:
This prospective study was conducted from April 2016 to July 2019 at Sardar Vallabhbhai Patel Post Graduate Institute of Paediatrics & SCB Medical College, Cuttack, Odisha among hospitalized children with acute gastroenteritis (AGE) under five years of age. Stool samples collected were tested for rotavirus by a commercial enzyme immunoassay and strains were characterized by reverse-transcription polymerase chain reaction (PCR). The data was analysed using a chi-square test with 95% confidence interval and risk ratio.
Results:
Rotavirus diarrhea was seen in 715 (36.4%) of the 1963 samples tested. The peak incidence of rotavirus diarrhea was during the winter season, i.e., from the month of December to February. Most of the infections were in children between 6 mo to 2 y of age, affecting boys and girls equally. The commonest genotypes were G3P[8] (50.34%) followed by G1P[8] (17.46%).
Conclusion:
This study highlights the high prevalence of rotavirus diarrhea among children which emphasize the need for continued rotavirus vaccination. The changing patterns of genotype distribution stress the need for continued surveillance post introduction of vaccines to understand the effect of vaccines on strain evolution over a longer period and detect emergence of new genotypes.
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