Prevalence of Streptococcus agalactiae capsular types among pregnant women in Rio de Janeiro and the impact of a capsular based vaccine
Braz. J. Pharm. Sci. (Online)
;
58: e20633, 2022. tab
Artigo
em Inglês
|
LILACS-Express
| LILACS
| ID: biblio-1420420
ABSTRACT
Abstract Streptococcus agalactiae (group B Streptococcus, GBS) remains one major neonatal pathogen, being maternal colonization a risk factor for infection development. Despite effective, the usage of antibiotics to prevent neonatal infections has limitations. The bacterial polysaccharide capsule is a virulence determinant, a target for vaccine directed to pregnant women, and also the most useful epidemiological marker of GBS infections. Capsular polysaccharides are diverse and disease severity varies according to the expressed type. Here, capsular typing of 124 GBS isolates recovered from pregnant women was determined by a multiplex PCR-based method. The most frequent types were Ia (33.0%), II (25.8%) and V (21.8%). Other types found were Ib (8.9%), III (8.9%) and IV (1.6%). While type Ia was prevalent during the whole period (2002-2018), fluctuations in distribution of other types, specially V, were observed over time. Capsular type III, traditionally associated with severe neonatal infections, was poorly detected. Distribution of maternal GBS capsular types in the metropolitan area of Rio de Janeiro, with prevalence of Ia and II, is quite different from other parts of the world. The knowledge about GBS capsular type distribution is essential to predict the theoretical impact of developing capsule-based vaccines in the local population.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Tipo de estudo:
Estudo de prevalência
/
Estudo prognóstico
/
Fatores de risco
Idioma:
Inglês
Revista:
Braz. J. Pharm. Sci. (Online)
Assunto da revista:
Farmacologia
/
Teraputica
/
Toxicologia
Ano de publicação:
2022
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal Fluminense/BR
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