title: Short report: analysis of clonal relationship among Shigella sonnei isolates circulating in Argentina.
abstract: Thirty-five isolates of Shigella sonnei from patients with diarrhoea in three geographic regions of Argentina were examined for genetic diversity by pulsed-field gel electrophoresis (PFGE) and plasmid profile. PFGE of XbaI and BlnI DNA digests confirmed the occurrence of outbreaks in two regions caused by two separate predominant clones of S. sonnei. The third region was characterized by three circulating clones, one of which was possibly associated with an outbreak. Similar plasmids were found in distinct clones and in one outbreak clone five different plasmid profiles were identified. Antimicrobial resistance of the isolates varied from fully susceptible to the agents tested, to resistance to cotrimoxazole, ampicillin and ciprofloxacin. Antibiotic resistance did not correlate with plasmid content. This information will form the basis for active surveillance of shigellosis in Argentina and elsewhere in the region through the PulseNet International Network.
authors.affiliation: Departamento Bacteriología, Instituto Nacional de Enfermedades Infecciosas - ANLIS Carlos G. Malbran, Buenos Aires, Argentina.
authors.forename: M
authors.initials: M
authors.lastname: Pichel
authors.forename: S
authors.initials: S
authors.lastname: González Fraga
authors.forename: R
authors.initials: R
authors.lastname: Terragno
authors.forename: J
authors.initials: J
authors.lastname: Mulki
authors.forename: A
authors.initials: A
authors.lastname: Gentile
authors.forename: C
authors.initials: C
authors.lastname: Kremer
authors.forename: A M
authors.initials: AM
authors.lastname: Mola
authors.forename: R
authors.initials: R
authors.lastname: Noseda
authors.forename: N
authors.initials: N
authors.lastname: Binsztein
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D001118:Argentina / Q000453:epidemiology; D004196:Disease Outbreaks / Q000517:prevention & control*; D004352:Drug Resistance, Microbial; D016521:Electrophoresis, Gel, Pulsed-Field; D005260:Female; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D010957:Plasmids; D012764:Shigella sonnei / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification
chemical_list: D000890:Anti-Infective Agents