Med. Weter. 71 (2), 114-117, 2015
full text
| Piech T., Wawron W., Bochniarz M., Krakowski L., Brodzki P. |
| Antibiotic resistance of pathogens isolated from bovine mastitis cases |
| The studies on resistance to selected antibiotics were conducted on a total of 5154 isolates, including 2661 Staphylococcus sp., 2349 Streptococcus sp. and 144 E. coli, obtained from clinical and subclinical cases of bovine mastitis. Milk came from dairy farms in the Lubelskie Voivodeship. During the five-year research period (2007-2011), the isolated bacteria proved susceptible to the following antibiotic medications: penicillin, streptomycin, tetracycline, neomycin, ampicillin, amoxicillin and clavulanic acid, cephalexin, cephoperason and lincomycin. Throughout the study period, the highest percentage of staphylococcus were resistant to tetracycline (23.8% - 38.5%) and lincomycin (16.4% - 33%), whereas the lowest number of staphylococcus isolates were resistant to cefoperazone (7.2% on average). With regard to streptococci, the least amount of isolates were resistant to amoxicillin (6% on average), whereas the highest rate of resistance was observed for streptomycin (49.4% - 70.8%), followed by neomycin (51.6% on average). Relatively low sensitivity to the antibiotics was displayed by E. coli isolates. Nearly 100% of the isolates showed resistance to penicillin. A high percentage of isolates (89.2% on average) proved resistant to lincomycin, as well. In total, the lowest number of isolates were resistant to cefoperazone (7.3% on average) and neomycin (14.9% on average). In the study period, no substantial deviations were observed in the percentage of isolates of each bacteria type resistant to a given antibiotic. |
| Key words: mastitis, antibiotic resistance, antibiotic drug |