title: Virulence properties and characteristics of Shiga toxin-producing Escherichia coli in São Paulo, Brazil, from 1976 through 1999.
abstract: Twenty-nine Shiga toxin-producing Escherichia coli (STEC) strains were identified in a collection of 2,607 isolates from patients with diarrhea in São Paulo, Brazil, from 1976 to 1999. The STEC strains belonged mainly to serotypes O111:HNM (HNM, nonmotile) (13 of 29 [44.8%]), O111:H8 (7 of 29 [24%]), and O26:H11 (4 of 29 [13.8%]); stx(1) eae (26 of 29 [89.6%]), in combination with either enterohemorrhagic E. coli hlyA (11 of 26 [42%]) or astA (24 of 26 [92.3%]), prevailed. The O111 STEC strains were distinguished by their inability to decarboxylate lysine. The predominance of STEC O111 and O26 since the late 1970s and the identification of STEC serotypes O55:H19, O93:H19, and O118:H16 in association with human infections in Brazil are described for the first time.
authors.affiliation: Instituto Adolfo Lutz. Universidade Federal de São Paulo-Escola Paulista de Medicina, São Paulo Instituto Adolfo Lutz, Ribeirão Preto.
authors.forename: T M I
authors.initials: TM
authors.lastname: Vaz
authors.forename: K
authors.initials: K
authors.lastname: Irino
authors.forename: M A M F
authors.initials: MA
authors.lastname: Kato
authors.forename: A M G
authors.initials: AM
authors.lastname: Dias
authors.forename: T A T
authors.initials: TA
authors.lastname: Gomes
authors.forename: M I C
authors.initials: MI
authors.lastname: Medeiros
authors.forename: M M M
authors.initials: MM
authors.lastname: Rocha
authors.forename: B E C
authors.initials: BE
authors.lastname: Guth
mesh_terms: D015373:Bacterial Typing Techniques; D001938:Brazil / Q000453:epidemiology; D003967:Diarrhea / Q000382:microbiology; D004926:Escherichia coli / Q000235:genetics* / Q000302:isolation & purification; D004927:Escherichia coli Infections / Q000453:epidemiology; D019453:Escherichia coli O157 / Q000235:genetics / Q000302:isolation & purification; D006801:Humans; D012703:Serotyping; D022621:Shiga Toxin / Q000235:genetics*; D014774:Virulence
chemical_list: D022621:Shiga Toxin