Antimicrobial susceptibility, phage types, and pulse types of Salmonella Typhimurium, in São Paulo, Brazil.
A total of 283 Salmonella Typhimurium strains isolated from cases of human infections and non human sources, were examined for antimicrobial susceptibility and the incidence of resistance was 38% and multiple resistance (to three or more antimicrobials) was 15%. All 43 multidrug-resistant strains (MDR) and 13 susceptible ones were characterized by phage typing and pulsed- field gel electrophoresis (PFGE). The strains encompassed 14 definitive phage types (DT), three were untypable (UT), and 18 atypicals or reaction does not conform (RDNC), which belonged to 21 PFGE patterns, A1-A21. The predominant phage types were DT49, DT193, and RDNC and two strains belonging to DT 104 and 104b were also identified. The most common PFGE patterns were A1 and A8. Analysis by PFGE and phage typing demonstrated that the most of the MDR were multiclonal and association among multiresistance, phage typing, and PFGE patterns was not so significant.
Ghilardi
Angela Cristina Rodrigues
AC
Seção de Bacteriologia, Instituto Adolfo Lutz, São Paulo, SP, 01246-902, Brasil. aguilard@ial.sp.gov.br
Tavechio
Ana Terezinha
AT
Fernandes
Sueli Aparecida
SA
D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001434:Bacteriophage Typing / Q000379:methods*; D001938:Brazil; D024901:Drug Resistance, Multiple, Bacterial; D016521:Electrophoresis, Gel, Pulsed-Field; D006801:Humans; D008826:Microbial Sensitivity Tests; D012486:Salmonella typhimurium / Q000145:classification / Q000187:drug effects*
D000900:Anti-Bacterial Agents