[Yersinia enterocolitica strains of bovine origin isolated in San Luis, Argentina: virulence, enterotoxigenicity, and antibiotic sensitivity].
Eleven Yersinia enterocolitica strains isolated from bovine tongues and classified as B1 0:5 Lis Xz (8), B2 0:9 Lis X3 (2), nontypable (1), were examined for the following virulence-associated characteristics: autoagglutination, calcium dependency, Sereny test, congo red binding and presence of 40-48 MDa plasmids. Heat-stable enterotoxin production was also determined. Antibiotic susceptibility was assayed according to the modified Bauer-Kirby's method. Two Y. enterocolitica B1 0:5 Lis Xz strains were positive for autoagglutination, calcium dependency and congo red binding; both exhibited nearly 40 MDa plasmids and one of them was enterotoxigenic. The other strains did not carry virulence-associated plasmids, 5 were congo red positive and 4 produced enterotoxin. Therefore, two B1 0:5 Lis Xz strains would be potentially virulent. All strains were susceptible to piperacillin, mezlocillin, cefuroxime, cefotaxime, amikacin, kanamycin, sisomicin, phosphomycin , chloramphenicol, trimethoprim-sulfamethoxazole and pipemidic acid. Ampicillin and sulfisoxazole proved to be less efficient.
Escudero
M E
ME
Cátedra de Bacteriología I, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Malbrán, Buenos Aires.
Eiguer
T
T
Caffer
M I
MI
Fronchkowsky
B
B
Fernández Cobo
M
M
Stefanini de Guzmán
A M
AM
D000818:Animals; D001118:Argentina; D002417:Cattle / Q000382:microbiology*; D004197:Disease Reservoirs; D004352:Drug Resistance, Microbial; D004768:Enterotoxins / Q000032:analysis; D005516:Food Microbiology; D008460:Meat / Q000382:microbiology*; D010957:Plasmids; D014059:Tongue / Q000382:microbiology; D014774:Virulence; D015008:Yersinia enterocolitica / Q000737:chemistry / Q000187:drug effects / Q000302:isolation & purification* / Q000472:pathogenicity
D004768:Enterotoxins
Cepas de Yersinia enterocolitica de origen bovino aisladas en San Luis, Argentina: virulencia, enterotoxigenicidad y sensibilidad a antibióticos.