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Journal of Clinical Microbiology, January 1999, p. 266-269, Vol. 37, No. 1
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Increasing Incidence and Comparison of Nalidixic Acid-Resistant Salmonella enterica subsp. enterica Serotype Typhimurium Isolates from Humans and Animals

Christine Heurtin-Le Corre, Pierre-Yves Donnio, Monique Perrin, Marie-France Travert, and Jean-Loup Avril*

UPRES 12-34 Microbiologie, Faculté de Médecine, Université de Rennes I, 35033 Rennes, France

Received 15 June 1998/Returned for modification 22 July 1998/Accepted 29 September 1998

We determined the resistance to quinolone of 309 Salmonella enterica subsp. enterica serotype Typhimurium strains isolated from humans and animals (cattle, pigs, or poultry) in 1995 or 1996. Nalidixic acid resistance increased from 8.5% in 1995 to 18.6% in 1996. The highest resistance levels correlated with a mutation at Ser-83 (or Asp-82). All strains remained ciprofloxacin susceptible. Human and animal isolates were compared by pulsed-field gel electrophoresis, and the banding patterns of the human isolates most closely matched those of the bovine isolates.

* Corresponding author. Mailing address: UPRES 12-34 Microbiologie, Faculté de Médecine, Université de Rennes I, 35033 Rennes, France. Phone: (33) (2)99-33-69-52. Fax: (33) (2)99-33-68-88. E-mail: Jean-Loup.Avril{at}univ-rennes1.fr.

Journal of Clinical Microbiology, January 1999, p. 266-269, Vol. 37, No. 1
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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Copyright © 1999 by the American Society for Microbiology. All rights reserved.