Abstract: The objective of this study was to recognize the bacteria involved in bovine subclinical mastitis and their resistance to selected antimicrobial agents. For this, 100 cows from 15 herds of Algerian center were randomly allocated and screened by the CMT (California Mastitis Test). The positive samples were analyzed by conventional bacteriological and Speed Mam® Color and tested for antimicrobial resistance of bacteria isolated. Bacteriological analysis shows that there is a wide range of germs that cause mastitis with 40% of Staphylococci aurus, 12% of Streptococci sp., 4% of Enterobacteriaceae, 4% of Pseudomonas sp., 12% for the association Staphylococci aureus+Streptococci sp., 8% for the association Streptococci sp.+E. coli, 8% for the association Staphylococci aureus+E. coli, 4% for the association Staphylococci aureus+Mycoplasma sp. and 4% for the association Staphylococci aureus+Streptococci sp.+E. coli (or contamination). Sensitivity tests were applied to different isolated strains and reveals the existence of resistance to antibiotics tested with varying proportions goal. However, no resistance of these organisms is noted for the danofloxacin and the association Amoxicillin+Clavulanic acid. This association of antibiotics would be the treatment of choice of the mastitis.
R. Saidi, D. Khelef and R. Kaidi, 2012. Prevalence of Bovine Subclinical Mastitis and Antibiotics Susceptibility Profiles of Isolates. Journal of Animal and Veterinary Advances, 11: 4190-4197.