Standard antimicrobial susceptibility tests used to determine bacterial susceptibility to antibiotics are growth dependent and time consuming. The long incubation time required for standard tests may render susceptibility results irrelevant, particularly for patients infected with lethal bacteria that are slow growing on agar but progress rapidly in vivo, such as Yersinia pestis. Here, we prese...

A rapid method of evaluating the susceptibility of spirochaetes to antibiotics would be convenient for investigators. Schneierson (1954) described a method of testing the susceptibility of strains of potentially pathogenic species, in which discs containing standard amounts of antibiotics were dropped into broth, and the broth was inoculated with the organism under study. He found that the resu...

We determined the prevalence of Escherichia coli O157:H7 in organically and naturally raised beef cattle at slaughter and compared antibiotic susceptibility profiles of the isolates to those of isolates from conventionally raised beef cattle. The prevalences of E. coli O157:H7 were 14.8 and 14.2% for organically and naturally raised cattle, respectively. No major difference in antibiotic suscep...

AIMS To compare the sensitivity and specificity of two semiautomated systems against a conventional (MIC 2000) test system for the identification and antibiotic susceptibility of Gram negative bacteria. METHODS Clinical isolates of Gram negative bacilli (188 urinary and 229 non-urinary strains) were identified and tested for antibiotic susceptibility in the Cobas Micro and MIC 2000 systems. O...