Antibiotic resistance inSalmonella enterica serotype typhimurium

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In order to analyse the development of antibiotic resistance inSalmonella spp., a total of 262Salmonella strains isolated in 1987 (n=148) and in 1996 (n=114) from clinical specimens in Würzburg, Germany, were tested in parallel by the agar diffusion method. In 1987, most of the strains wereSalmonella enterica serotype typhimurium (42.6%), whereas in 1996 most wereSalmonella enterica serotype enteritidis (68.4%). The majority ofSalmonella enterica serotype enteritidis isolates was fully susceptible in 1987 and 1996. In contrast, the percentage of drug-resistant strains ofSalmonella enterica serotype typhimurium increased significantly from 27% in 1987 to 52.4% in 1996. This increase, which might reflect uncontrolled use of antibiotics in the environment, should be of concern to public health authorities.