Salmonella enterica serovar Heidelberg strains are frequently associated with food-borne illness, with recent isolates showing higher rates of resistance to multiple antimicrobial agents. One hundred eighty S. enterica serovar Heidelberg isolates, collected from turkey-associated production and processing sources, were tested for antimicrobial susceptibility and compared by pulsed-field gel electrophoresis (PFGE) and plasmid profile analysis. The potential for the transfer of resistance between strains was studied by conjugation experiments. PFGE analysis using XbaI digestion identified eight clusters (based on 90% similarity), with the largest containing 71% of the isolates. Forty-two percent of the isolates were resistant to at least 1 of the 15 antimicrobial agents tested, and 4% of the isolates were resistant to 8 or more antimicrobial agents. Resistances to streptomycin (32%), tetracycline (30%), and kanamycin (24%) were most commonly detected. Interestingly, the XbaI PFGE profiles of selective multidrug-resistant strains (n = 22) of S. enterica serovar Heidelberg from turkey-associated sources were indistinguishable from the predominant profile (JF6X01.0022) detected in isolates associated with human infections. These isolates were further differentiated into seven distinct profiles following digestion with the BlnI enzyme, with the largest cluster comprising 15 isolates from veterinary diagnostic and turkey processing environments. Conjugation experiments indicated that resistance to multiple antimicrobial agents was transferable among strains with diverse PFGE profiles.
- American Society for Microbiology
- Characterization of salmonella enterica serovar heidelberg from ...
Editorial: Talking Turkey
While pondering a title for this month’s Editorial, the phrase Let’s Talk Turkey popped into my head. Perhaps it is the double entendre, as in I will talk to you about our family recipe for turkey and stuffing. But in this case, I’m going with the meaning of talking turkey that is in the Dictionary of American Slang and Colloquial Expressions by Richard A. Spears: “Totalkserious business; totalkfrankly.” So let’s talk frankly about the serious business of organics recycling,...
MODULO used for a major project in Turkey
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Turkey Onion Processing
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