Detection and Characterization of Shiga Toxin ProducingEscherichia coli,Salmonellaspp., andYersiniaStrains from Human, Animal, and Food Samples in San Luis, Argentina

[摘要] Shiga toxin producingEscherichia coli(STEC),Salmonellaspp., andYersiniaspecies was investigated in humans, animals, and foods in San Luis, Argentina. A total of 453 samples were analyzed by culture and PCR.The antimicrobial susceptibility of all the strains was studied, the genomic relationships among isolates of the same species were determined by PFGE, and the potencial virulence ofY. enterocoliticastrains was analyzed.Yersiniaspecies showed higher prevalence (9/453, 2.0%, 95% CI, 0.7–3.3%) than STEC (4/453, 0.9%, 95% CI, 0–1.8%) andSalmonellaspp. (3/453, 0.7%, 95% CI, 0–1.5%).Y. enterocoliticaandY. intermediawere isolated from chicken carcasses (6/80, 7.5%, 95% CI, 1.5–13.5%) and porcine skin and bones (3/10, 30%, 95% CI, 0–65%). One STEC strain was recovered from human feces (1/70, 1.4%, 95% CI, 0–4.2%) and STECstx1/stx2genes were detected in bovine stools (3/129, 2.3%, 95% CI, 0–5.0%).S. Typhimurium was isolated from human feces (1/70, 1.4%, 95% CI, 0–4.2%) while oneS. Newport and twoS. Gaminara strains were recovered from one wild boar (1/3, 33%, 95% CI, 0–99%). The knowledge of prevalence and characteristics of these enteropathogens in our region would allow public health services to take adequate preventive measures.

[学科分类] 微生物学和免疫学