Cefotaxime, ciprofloxacin, norfloxacin or levofloxacin are likely to be effective against salmonella, but ampicillin, cephazolin and amoxicillin-clavulanic acid may not be, based on the results of new research published in the Journal of Food Protection.
A researcher from Baysal University in Turkey studied resistance patterns in salmonella found on 225 meat products (poultry, ground beef and beef cuts) bought at retail. Of all the specimens collected, 22.2 percent tested positive for salmonella.
None of the strains exhibited resistance to cefotaxime, ciprofloxacin, norfloxacin or levofloxacin. The highest resistance rates, on the other hand, were 64 percent each for ampicillin and cephazolin and 56 percent for amoxicillin-clavulanic acid. A total of 62 percent of the 50 Salmonella strains were multiresistant to three or more antimicrobial agents. Furthermore, 32 percent exhibited multiple resistance to four or more antimicrobial drugs.
This, despite the fact that none of the isolates exhibited beta-lactamase enzyme activity.