Rotavirus genotype and Vesikari score of outpatients in Japan in the vaccine era.
Pediatr Int
; 62(5): 569-575, 2020 May.
Article
em En
| MEDLINE
| ID: mdl-31957129
ABSTRACT
BACKGROUND:
Group A rotaviruses (RVs) are a major cause of severe gastroenteritis among infants and young children. In Japan, RV vaccines were introduced in 2011, leading to a reduction in severe gastroenteritis cases. Studies are required to assess the effectiveness of the vaccines and their effect on the prevalence of RV genotypes.METHODS:
Fecal samples were collected from outpatients with RV gastroenteritis in a pediatric clinic in Sapporo, Japan, from 2010 to 2016. GPI genotypes were determined using reverse-transcription polymerase chain reaction. Clinical information and immunization records were obtained from outpatients after 2013. GPI genotypes and clinical features were compared between patients with and without a RV vaccine history.RESULTS:
In total, 270 cases were genotyped. G1P[8]I1 (Wa-like G1P[8]) strains were dominant from 2010 to 2012. G1P[8]I2 (DS-1-like G1P[8]) strains appeared in 2012 and dominated in 2013 to 2015. G2P[4]I2 and G9P[8]I1 strains increased every 3 years (G2P[4]I2 2011 and 2014, G9P[8]I1 2010, 2013 and 2016). After the 2013 season, 137 cases were collected, 24 of which were vaccinated. Cases requiring drip infusion were fewer in the vaccination group than in the non-vaccination group (16.7% vs 52.2%). No patients required hospitalization in the vaccination group compared with 10.6% in the non-vaccination group. A severe Vesikari score was less common in the vaccination group than in the non-vaccination group (33.3% vs 78.8%). There was no significant difference in the GPI genotype distribution between the two groups.CONCLUSION:
Rotaviruses vaccine effectiveness, regardless of GPI genotype, was confirmed in terms of alleviation of disease severity.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Infecções por Rotavirus
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Rotavirus
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Vacinas contra Rotavirus
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Gastroenterite
Tipo de estudo:
Risk_factors_studies
Limite:
Child, preschool
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Female
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Humans
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Infant
/
Male
País/Região como assunto:
Asia
Idioma:
En
Revista:
Pediatr Int
Assunto da revista:
PEDIATRIA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Japão