Environmental Occurrence and Antibiotic Susceptibility Profile of Listeria monocytogenes at a Slaughterhouse Raw Processing Plant in Romania
2016
ABSTRACT This survey was conducted to investigate the occurrence and antimicrobial susceptibility of Listeria monocytogenes isolates in the environment of a pig slaughterhouse raw processing plant complex in western Romania. A total of 97 environmental samples from food contact (n = 60) and nonfood contact (n = 37) surfaces were examined with standard methods. The susceptibility of the isolates to 17 antimicrobial agents was determined with the VITEK 2 automated system. Overall, 25 (25.8%) samples were positive for L. monocytogenes, with recovery rates of 23.3% (n = 14) and 29.7% (n = 11) for food contact and nonfood contact surfaces, respectively. All 25 tested isolates were resistant to benzylpenicillin, imipenem, and fusidic acid. Resistance was observed to oxacillin (23 isolates; 92%), fosfomycin (23 isolates; 92%), clindamycin (22 isolates; 88%), rifampin (14 isolates; 56%), trimethoprim-sulfamethoxazole (12 isolates; 48%), tetracycline (11 isolates; 44%), and ciprofloxacin (1 isolate; 4%). No resist...
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