The prevalence of antibiotic resistant bacteria in milk from mastitic and non mastitic cases

Othman, Norlida (1985) The prevalence of antibiotic resistant bacteria in milk from mastitic and non mastitic cases. [Project Paper] (Submitted)

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Abstract

Sixty cows from three established farms in Malaysia were randomly selected and they were subjected to the California mastitis test to determine the presence of mastitis. The results obtained showed that the prevalence of mastitis in the three farms were very high (81.67°/4). Out of 127 organisms isolated, 36 were Staphylococcus pyogenes, 20 Micrococcus spp, 16 Corynebacterium spp.13 Staphylococcus epidermidis and 10 Streptococcus spp. The predominant organism isolated in each farm was Staphylococcus pyogenes. In Farm A 27.3 percent of the isolates were Staphylococcus pyogenes while in Farms B' and C, it was 35 and 23.3 percent respectively. Nearly all of the organisms isolated from the three farms showed resistance to Penicillin. However, all the isolates tested showed complete sensitivity to Gentamycin except for one isolate of Pseudomonas aeruginosa. Fourteen out of 36 Staphylococcus pyogenes isolated showed resistance to Penicillin, while nine and seven isolates showed resistance to Chloramphenicol and Sulphonamides respectively. Streptococcus spp. showed a high resistance to Sulphonamides and Tetracycline. In addition to Penicillin, the Staphylococcus pyogenes isolated in farm A was resistant to Chloramphenicol and Tetracycline whilst in Farms B and C it was also resistant to Sulphonamides.

Item Type:	Project Paper
Subjects:	S Agriculture > SF Animal culture
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms Nurhaznita Mahmood
Date Deposited:	17 Oct 2025 02:54
Last Modified:	17 Oct 2025 02:54
URI:	http://psaspb.upm.edu.my/id/eprint/2480

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