Detection and Characterization of Shiga Toxin Producing Escherichia coli, Salmonella spp., and Yersinia Strains from Human, Animal, and Food Samples in San Luis, Argentina

Table 3

Phenotypic virulence assays corresponding to Y. enterocolitica strains.

Total of strains	Bioserotype	Origin	Phenotypic assays*
			Esc	Pyr	AA	Ca^2+	CR
2	B1A O:12,25-12,26	Chicken carcasses	+	+	+	−	−
3	B1A O:7,8-8-8,19	Porcine skin and bones	+	+	+	−	−
2	B1A O:7,8-8-8,19	Chicken carcasses	+	+	+	−	−
1	W1024 B2 O:9	Reference strain	−	−	+	+	+
1	MCH 700 B4 O:3	Reference strain	−	−	+	+	+
1	29C-46 B4 O:3	Reference strain	−	−	+	+	+
1	B2 O:9	Eggshell (local strain)	−	−	+	+	+

^∗Esc: esculin hydrolysis; Pyr: pyrazinamide hydrolysis; AA: autoagglutination at 37°C; Ca²⁺: calcium dependence; and CR: congo red binding.