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Antimicrobial sensitivity of Escherichia coli, Salmonella spp., Pasteurella multocida, Streptococcus suis and Actinobacillus pleuropneumoniae isolated from diagnostic samples from large pig breeding farms in Croatia

Boris Habrun ; Department of Bacteriology and Parasitology, Croatian Veterinary Institute, Zagreb, Croatia
Gordan Kompes ; Department of Bacteriology and Parasitology, Croatian Veterinary Institute, Zagreb, Croatia
Željko Cvetnić ; Department of Bacteriology and Parasitology, Croatian Veterinary Institute, Zagreb, Croatia
Silvio Špičić ; Department of Bacteriology and Parasitology, Croatian Veterinary Institute, Zagreb, Croatia
Miroslav Benić ; Department of Bacteriology and Parasitology, Croatian Veterinary Institute, Zagreb, Croatia
Mario Mitak ; Department for Veterinary Public Health, Croatian Veterinary Institute, Zagreb, Croatia

Sažetak

The disk diffusion method was employed to assess the sensitivity of 256 Escherichia (E.) coli, 42 Salmonella spp. and 62 Streptococcus (S.) suis isolates to 13 antimicrobials, and of 108 Pasteurella (P.) multocida and 44 Actinobacillus (A.) pleuropneumoniae isolates to 14 antimicrobials. All study isolates were obtained from diagnostic material collected at 8 large pig breeding farms in Croatia. E. coli isolates showed the highest rate of resistance to oxytetracycline, streptomycin and ampicillin (98%, 91% and 85% of isolates,
respectively), whereas 87% of the isolates were resistant to 4 or more antimicrobials. Salmonella spp. isolates were most sensitive to enrofloxacin and colistin (all isolates), whereas highest rate of resistance was recorded to oxytetracycline and streptomycin (86% and 67% of isolates, respectively). More than 90% of P. multocida isolates were sensitive to ampicillin, amoxicillin with clavulanic acid, cefotaxime, colistin, florfenicol and enrofloxacin, whereas the highest rate of resistance was observed to streptomycin and nalidixic acid (59% and 43%, respectively). S. suis isolates were most sensitive to cefotaxime and florfenicol (94% of isolates both), whereas the highest resistance was recorded to streptomycin (100%). All A. pleuropneumoniae isolates showed sensitivity to amoxicillin with clavulanic acid, cefotaxime, florfenicol and enrofloxacin, and more than 90% of these isolates were sensitive to penicillin G, ampicillin, colistin, gentamicin and spectinomycin, whereas the highest rate of resistance was recorded to nalidixic acid and streptomycin (59% and 36%, respectively). Sensitivity to all antimicrobials tested was recorded in 27% of A. pleuropneumoniae isolates, whereas 41% of these isolates were resistant to one, and 27% to 2-4 of the antimicrobials tested. Of the bacterial species included in the study, the highest rate of antimicrobial resistance included in the study, the highest rate of antimicrobial resistance was recorded in E. coli, and lowest rate in A. pleuropneumoniae isolates.

Ključne riječi

antimicrobial sensitivity; E. coli; Salmonella spp.; P. multocida; S. suis; A. pleuropneumoniae

Hrčak ID:

62144

URI

https://hrcak.srce.hr/62144

Datum izdavanja:

26.10.2010.

Podaci na drugim jezicima: hrvatski

Posjeta: 3.255 *