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J Glob Infect Dis. 2019 Oct-Dec;11(4):147-152. doi: 10.4103/jgid.jgid_16_19. Epub 2019 Nov 26.

Burden and Molecular Epidemiology of Rotavirus Causing Diarrhea among Under-Five Children: A Hospital-based Study from Eastern India.

Author information

1
Department of Biotechnology, Infection Biology Laboratory, KIIT Deemed to be University, Vellore, Tamil Nadu, India.
2
Division of Gastrointestinal Sciences, The Wellcome Trust Research Laboratory, Christian Medical College, Vellore, Tamil Nadu, India.
3
Department of Microbiology and Immunology, Medical University of the Americas, Nevis, WI.
4
Department of Health, Kalinga Institute of Social Sciences, KISS University, Bhubaneswar, Odisha, India.
5
Department of Paediatrics, Kalinga Institute of Medical Sciences, KIIT Deemed to be University, Bhubaneswar, Odisha, India.
6
Department of Pediatrics, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India.

Abstract

Background:

Rotavirus (RVA) causes severe gastroenteritis in under-five children, and there are many diverse strains of the virus that are localized to different parts of the world.

Objectives:

To study the burden and molecular epidemiology of RVA causing gastroenteritis among children from Eastern India.

Materials and Methods:

This hospital-based cross-sectional study included children under-five with gastroenteritis. Demographic and clinical parameters were recorded in a predesigned pro forma. Stool samples collected from these children were initially screened for RVA VP6 antigen by enzyme immunoassay (EIA). Each EIA-positive sample was then subjected to RNA extraction, followed by reverse transcription, and heminested multiplex polymerase chain reaction for genotyping of RVA strains.

Results:

Of 320 included children, RVA was detected in 30.62% (98/320) cases by EIA. The highest incidence for RVA-positive cases (34.61%) was observed among children in the age group of 24-36 months, followed by 0-12 months (33.04%). Of the 97 completely typed samples, single genotype was detected in 85 (87.62%) samples with either G (VP7) or P (VP4) types. However, mixed genotypes were detected in 12 (11.21%) samples. G3P[8] (44.09%) was the most common genotype, followed by G1P[8] (32.65%), G2[P4] (5.10%), G1[P6] (3.06%), and G9[P4] (1.02%).

Conclusions:

The present study found RVA positivity in 30.62% of children with gastroenteritis, with the highest burden among 24-36 months old. The predominant genotypes were G1, G3, and P[8]. Further large-scale/multicentric studies should be conducted to document the diversity of circulating RVA genotypes in this region for giving inputs for vaccination strategy.

KEYWORDS:

Diarrhea; G-type; P-type; Rotavirus; genotyping; molecular epidemiology

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