Aim : The study was carried out to investigate the prevalence and antimicrobial susceptibility of clinical pathogens isolated from Bovine Mastitis in and around Coimbatore District, Tamilnadu, South India. Materials and Methods: A total of 250 milk samples were screened and 152 isolates of Staphylococci were obtained and their susceptibility to several antimicrobial agents by agar disc diffusion method. Results: Out of 152 isolates of Staphylococcus aureus resistance was detected in 63 (41.44%), 39 (25.65%), 21(13.81%), 18 (11.84%), 6 (3.94%) and 5 (3.28%) isolates for penicillin, streptomycin, erythromycin, tetracycline, ampicillin and Cephalothin, respectively. No resistance was detected for Gentamicin. Conclusion: Results indicated that these isolates exhibited the highest degree of resistance to penicillin of all antimicrobial agents tested.

Methanol and aqueous extracts of Delonix elata (Bojer ex Hook.) Raf. (Fabaceae) and Spathodea campanulata P. Beauv. (Bignoniaceae) were evaluated for their antimicrobial activities against nine bacterial species: Bacillus cereus, Staphylococcus aureus, Streptococcus pneumonia, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia, Salmonella typhi, Proteus vulgaris and Shigella flexneri and two fungal species: Aspergillus niger and Candida albicans. The susceptibility of the microorganism to the extracts of these plants was compared with each other and with selected antibiotics. All these plants were effective against three or more of the pathogenic microorganisms. This in vitro study corroborated the antimicrobial activity of the selected plants used in folklore medicine.

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