engleski

ANTIMICROBIAL RESISTANCE OF SALMONELLAE ISOLATED FROM FISH MEAL

The high incidence of antibiotic resistance in salmonella serotypes isolated from animals poses a high risk in terms of epizootiology and public health. Quite frequently, fish meal and fodder are the initial source of salmonella in stock breeding, mostly implying some unusual serotypes. Such serotypes originate from the natural reservoirs of salmonella and their antimicrobial resistance can only be the consequence of their natural resistance. Twenty-five salmonella serotypes isolated from fish meal were tested for their sensitivity to 19 antimicrobial agents by the method of agar diffusion. All salmonella serotypes showed sensitivity to chloramphenicol, gentamicin, ciprofloxacin, streptomycin, enrofloxacin, neomycin, fosfomycin, cefazolin, amoxicillin+clavulanic acid, cefotaxime, and nalidixic acid (96%), trimethoprim/sulfa (84%) and tetracycline (77%). Intermediate resistant was recorded to tetracycline and erythromycin (23% and 65% of the strains tested, respectively). All strains were resistant to bacitracin, vancomycin and penicillin G, as well as to erythromycin (35%), trimethoprim/sulfa (15%), ampicillin (4%), amoxicillin (4%) and nalidixic acid (4%).

Antimicrobial Resistence; Salmonellae

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