title: Progression of Salmonella enteritidis phage type 4 strains in São Paulo State, Brazil.
abstract: A total of 574 S. Enteritidis strains (383 from human sources and 191 from non-human sources) isolated between 1975-95, in São Paulo State, Brazil, were phagetyped. Among the strains isolated during the period of 1975-92, 80.9% of them belonged to phage type 8 (PT-8), but in 1993 strains of PT-4 accounted for 65.2% of all the S. Enteritidis isolates. In the following years, PT-4 strains accounted for 99.7% and 98.4% of phagetyped S. Enteritidis strains. The results obtained suggested that the current epidemic of S. Enteritidis in São Paulo State is clearly associated with the progression of PT-4 strains.
authors.affiliation: Instituto Adolfo Lutz, Seção de Bacteriologia, São Paulo, Brazil.
authors.forename: K
authors.initials: K
authors.lastname: Irino
authors.forename: S A
authors.initials: SA
authors.lastname: Fernandes
authors.forename: A T
authors.initials: AT
authors.lastname: Tavechio
authors.forename: B C
authors.initials: BC
authors.lastname: Neves
authors.forename: A M
authors.initials: AM
authors.lastname: Dias
mesh_terms: D017122:Bacteriophage T4; D001434:Bacteriophage Typing; D001938:Brazil; D006801:Humans; D012477:Salmonella enteritidis / Q000145:classification* / Q000302:isolation & purification