VP7 gene polymorphism of serotype G9 rotavirus strains and its impact on G genotype determination by PCR.
Virus Res
; 90(1-2): 1-14, 2002 Dec.
Article
em En
| MEDLINE
| ID: mdl-12457958
ABSTRACT
Rotaviruses are the single most important etiologic agents of severe diarrhea of infants and young children worldwide. Surveillance of rotavirus serotypes/genotypes (both VP7[G] and VP4[P]) is in progress globally in which polymerase chain reaction (PCR) has been the assay of choice. We investigated polymorphism of the VP7 gene of serotype G9 rotavirus strains and its impact on the determination of VP7 gene genotype by PCR assay. By VP7 gene sequence analysis, we and others have previously shown that the G9 rotavirus strains belong to one of three VP7 gene lineages. By PCR assay using three different sets of commonly used primers specific for G1-4, 8 and 9, 23 Brazilian G9 strains and 5 well-characterized prototype G9 strains which collectively represented all three VP7 gene lineages were typed as (i). G3; (ii). G4; (iii). G9; (iv). G3 and G9; or (v). G9 and G4 depending on a primer pool employed. This phenomenon appeared to be due to (i). a VP7 gene lineage-specific polymorphism, more specifically mutation(s) in the primer binding region of the VP7 gene of G9 strain; and (ii). the magnitude of difference in nucleotide homology at respective primer binding site between homotypic (G9) and heterotypic (G3 or G4) primers present in a primer pool employed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polimorfismo Genético
/
Reação em Cadeia da Polimerase
/
Rotavirus
/
Proteínas do Capsídeo
/
Gastroenterite
/
Antígenos Virais
Limite:
Child, preschool
/
Humans
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Virus Res
Assunto da revista:
VIROLOGIA
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Brasil