Antibiotic resistance of Shigella spp., Salmonella spp., and Yersinia spp. isolated in Quebec.

Salmonella spp., Shigella spp., and Yersinia spp. are important enteropathogenic bacteria. Antibiotic treatment is normally indicated for infections caused by Shigella spp. and only in the case of severe infections for Salmonella and Yersinia. Studies from a number of countries have reported the development of resistance of these bacteria to certain antibiotics. The new quinolones, such as ciprofloxacin, have proven effective in vitro against the usual enteropathogens. There are no recent Quebec data on the antibiotic resistance of these enteropathogenic bacteria.