Reduction in Severity of All-Cause Gastroenteritis Requiring Hospitalisation in Children Vaccinated against Rotavirus in Malawi

Journal article


Mandolo, J.J, Henrion, M.Y.R, Mhango, C, Chinyama, E, Wachepa, R, Kanjerwa, O, Malamba-Banda,C, Shawa, I., Hungerford, D, Kamng’ona, A.W, Iturriza-Gomara, M, Cunliffe, N.A and Jere, K.C 2021. Reduction in Severity of All-Cause Gastroenteritis Requiring Hospitalisation in Children Vaccinated against Rotavirus in Malawi. Viruses. 13 (12). https://doi.org/10.3390/v13122491
AuthorsMandolo, J.J, Henrion, M.Y.R, Mhango, C, Chinyama, E, Wachepa, R, Kanjerwa, O, Malamba-Banda,C, Shawa, I., Hungerford, D, Kamng’ona, A.W, Iturriza-Gomara, M, Cunliffe, N.A and Jere, K.C
Abstract

Rotavirus is the major cause of severe gastroenteritis in children aged <5 years. Introduction of the G1P[8] Rotarix® rotavirus vaccine in Malawi in 2012 has reduced rotavirus-associated hospitalisations and diarrhoeal mortality. However, the impact of rotavirus vaccine on the severity of gastroenteritis presented in children requiring hospitalisation remains unknown. We conducted a hospital-based surveillance study to assess the impact of Rotarix® vaccination on the severity of gastroenteritis presented by Malawian children. Stool samples were collected from children aged <5 years who required hospitalisation with acute gastroenteritis from December 2011 to October 2019. Gastroenteritis severity was determined using Ruuska and Vesikari scores. Rotavirus was detected using enzyme immunoassay. Rotavirus genotypes were determined using nested RT-PCR. Associations between Rotarix® vaccination and gastroenteritis severity were investigated using adjusted linear regression. In total, 3159 children were enrolled. After adjusting for mid-upper arm circumference (MUAC), age, gender and receipt of other vaccines, all-cause gastroenteritis severity scores were 2.21 units lower (p < 0.001) among Rotarix®-vaccinated (n = 2224) compared to Rotarix®-unvaccinated children (n = 935). The reduction in severity score was observed against every rotavirus genotype, although the magnitude was smaller among those infected with G12P[6] compared to the remaining genotypes (p = 0.011). Each one-year increment in age was associated with a decrease of 0.43 severity score (p < 0.001). Our findings provide additional evidence on the impact of Rotarix® in Malawi, lending further support to Malawi’s Rotarix® programme.

Keywordsrotavirus; genotypes; gastroenteritis; Malawi; severity scores
Year2021
JournalViruses
Journal citation13 (12)
PublisherMDPI
ISSN1999-4915
Digital Object Identifier (DOI)https://doi.org/10.3390/v13122491
Web address (URL)https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8707889/
https://www.mdpi.com/1999-4915/13/12/2491
Output statusPublished
Publication dates
Online13 Dec 2021
Publication process dates
Deposited06 Jun 2023
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