Molecular Epidemiology of Rotavirus A Strains Pre- and Post-Vaccine (Rotarix®) Introduction in Mozambique, 2012–2019: Emergence of Genotypes G3P[4] and G3P[8]
| Autor: | Marta Cassocera, Nilsa de Deus, Elda Anapakala, Hester G. O'Neill, Benilde Munlela, Júlia Sambo, Orvalho Augusto, Idalécia Cossa-Moiane, Jerónimo Langa, Simone S. Boene, Diocreciano Matias Bero, Assucênio Chissaque, Isabel Mauricio, Esperança Lourenço Guimarães, Jorfélia José Chilaúle, Jason M. Mwenda, Eva D. João |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Microbiology (medical)
Veterinary medicine General Immunology and Microbiology Molecular epidemiology Rotarix lcsh:R lcsh:Medicine rotavirus type A Biology medicine.disease_cause Group A G3 genotype Infectious Diseases Immunization Rotavirus Genotype medicine Etiology Immunology and Allergy Mozambique vaccine surveillance Molecular Biology Genotyping Pre and post |
| Zdroj: | Pathogens Volume 9 Issue 9 Pathogens, Vol 9, Iss 671, p 671 (2020) |
| ISSN: | 2076-0817 |
| DOI: | 10.3390/pathogens9090671 |
| Popis: | Group A rotavirus (RVA) remains the most important etiological agent associated with severe acute diarrhea in children. Rotarix® monovalent vaccine was introduced into Mozambique’s Expanded Program on Immunization in September 2015. In the present study, we report the diversity and prevalence of rotavirus genotypes, pre- (2012–2015) and post-vaccine (2016–2019) introduction in Mozambique, among diarrheic children less than five years of age. Genotyping data were analyzed for five sentinel sites for the periods indicated. The primary sentinel site, Mavalane General Hospital (HGM), was analyzed for the period 2012–2019, and for all five sites (country-wide analyses), 2015–2019. During the pre-vaccine period, G9P[8] was the most predominant genotype for both HGM (28.5%) and the country-wide analysis (46.0%). However, in the post-vaccine period, G9P[8] was significantly reduced. Instead, G3P[8] was the most common genotype at HGM, while G1P[8] predominated country-wide. Genotypes G9P[4] and G9P[6] were detected for the first time, and the emergence of G3P[8] and G3P[4] genotypes were observed during the post-vaccine period. The distribution and prevalence of rotavirus genotypes were distinct in pre- and post-vaccination periods, while uncommon genotypes were also detected in the post-vaccine period. These observations support the need for continued country-wide surveillance to monitor changes in strain diversity, due to possible vaccine pressure, and consequently, the effect on vaccine effectiveness. |
| Databáze: | OpenAIRE |
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