Medycyna Wet. 64 (9), 1132-1135, 2008
| Wawron W., Piech T., Bochniarz M. |
| Antibiotic sensitivity of pathogens isolated from cows with mastitis |
| In the study the antibiotic sensitivity of 3788 staphylococcus strains, 1981 streptococcus strains and 124 Escherichia coli strains isolated from cows with mastitis was tested. Milk samples were collected from individual dairy farms in the Lublin region. During the 6-year study cycle we determined the sensitivity of isolated bacteria to the following antibiotics: penicillin, streptomycin, tetracyclines, neomycin, ampicillin, amoxicillin and cefoperason. Streptococci showed the highest sensitivity to cefoperason (84.9% - 98.2% of susceptible strains) and amoxicillin (50.9% - 95.7%). The highest percentage of staphylococcus strains was sensitive to amoxicillin (from 100% in 2002 to 80.5% in 2006) and to ampicillin (92.3% on average). E. coli was characterised by a relatively low sensitivity to the antibiotics examined. The highest percentage of its strains was sensitive to neomycin and streptomycin (83.2% and 78.1%, respectively). Moreover, E. coli was found to be 100% resistant to penicillin throughout the study period. In general, the percentage of strains sensitive to the antibiotics tested decreased significantly, particularly in the final year of observations. |
| Key words: mastitis, antibiotic sensitivity, antibiotics |