Prevalence of Methicillin Resistant Staphylococcus aureus (MRSA) in Cattle Milk from dairy Herds in Oyo state, Nigeria.
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Veterinary and Biomedical Sciences, Faculty of Veterinary Medicine University of Abuja.
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) has received a lot of attention in recent years
as a zoonotic organism of global concern. Contaminated milk, especially those from mastitic
cows, serve as reservoirs for humans in the epidemiology of antibiotic resistant MRSA. This study
was designed to determine the level of contamination of bulk fresh milk from dairy cattle herds
with MRSA in Ibarapa, Oyo and Oke-Ogun areas of Oyo State and the antibiotic resistance profile
of the isolates. One hundred and sixty-five (165) milk samples were obtained from the study areas
and used for the study. Staphylococcus aureus was isolated from the samples using bacterial
culture and biochemical tests. Methicillin-resistant Staphylococcus aureus was identified using
cefoxitin disk diffusion method. All the S. aureus isolates were subjected to microbial susceptibility
test. Ninety (54.5%) milk samples were positive for Staphylococcus spp. out of which 52 (31.5%)
were Staphylococcus aureus and 13 (7.9%) yielded MRSA. Antibiogram of S. aureus indicated
highest resistance to Cloxacillin (88.5%) followed by (Augmentin 67.3%) and Ceftrazidine
(67.3%). Ten out of the 13 MRSA isolates were multidrug resistance while all the isolates were
100% susceptible to ofloxacin. The results of this study showed that milk produced from dairy
cattle in Oyo State was contaminated with MRSA. This portends serious food safety and public
health risk among the consumers of such milk especially in raw or improperly pasteurized form.
Proper dairy herd health management and prudent use of antibiotics and hygienic milking
procedures are hereby recommended to prevent contamination of milk and subsequent spread of
the organism to humans.
Description
Keywords
Methicillin-resistance, Staphylococcus aureus (MRSA), Fresh cattle milk, Antimicrobial resistance.
Citation
Oludairo, O. O., Olatoye, O. I., Awoniyi, O. E., Adejumobi, O. A. and Aiyedun, J. O. (2020); Prevalence of Methicillin Resistant Staphylococcus aureus (MRSA) in Cattle Milk from dairy Herds in Oyo state, Nigeria. Journal of Veterinary and Biomedical Sciences. 2 (2); 73-82.