PREVALENCE OF Staphylococccus aureus ISOLATED FROM BOVINE MASTITIS MILK IN ZARIA

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dc.contributor.authorOKUNADE, EUNICE ADENIKE
dc.date.accessioned2014-03-10T09:41:36Z
dc.date.available2014-03-10T09:41:36Z
dc.date.issued2008-10
dc.descriptionA DISSERTATION SUBMITTED TO THE POSTGRADUATE SCHOOL, AHMADU BELLO UNIVERSITY, ZARIA NIGERIA IN PARTIAL FULFILLMENT FOR THE AWARD OF MASTER OF SCIENCE IN MICROBIOLOGY DEPARTMENT OF MICROBIOLOGY AHMADU BELLO UNIVERSITY, ZARIA NIGERIA.en_US
dc.description.abstractThis study investigates the prevalence of S. aureus isolated from bovine mastitic milk in Zaria. The samples (n =350 quarters) were randomly collected from 91 lactating cows in 20 herds in Sabon-pegi, Shika, Sabon gari, Wusasa, Nuba, Bomo and Hanwa and 20% of cows in each herds were sampled. The physicochemical quality, prevalence of subclinical mastitis using California Mastitis Test (CMT) and bacteriological quality of the milk samples were determined using standard methods. All the milk samples (100%) had no clots, were colourless and consistent.The specific gravity and pH of the milk samples had ranges of 1.023-1.033 and 3.11-6.99 respectively. The prevalence of subclinical mastitis was 75 (21.4%). The prevalence of S. aureus and coagulase negative staphylococci (CNS) in subclinical mastitis were 11 (14.7%) and 16 (21.3%) respectively, and in 350 quarter milk samples were 28 (8%) and 41 (11.7%) respectively. There was a statistical significant difference (P < 0.05) in S. aureus isolated in the quarter milk samples that were CMT positive than those that were CMT negative. There was also significant association (P < 0.05) between the CMT positive milk samples and specific gravity, and between S. aureus isolated and specific gravity of milk. The means ± standard deviation of bacterial isolates of the bulk milk samples and their products ranged from 1.02±1.40 log10 cfu/ml - 2.05±1.05 log10cfu/ml and 1.13±1.77 log10cfu/ml – 1.40±1.62 log10cfu/ml respectively and were within the acceptable microbial limit of <102 cfu/ml for S. aureus and ≤ 5.0 x 102 cfu/ml for bacterial growth. Out of the 17 bulk milk sampled, 1 (5.9%) of the bulk milk sample had antibiotic residues. S. aureus isolates in this study showed high susceptibility (≥80% each) to all the antimicrobial agents [amoxicillin (25μg), augumentin (30μg), chloramphenicol (30μg), cloxacillin (5μg), cotrimazole (25μg), erythromycin (5μg), gentamycin (10μg) and tetracyclin (10μg)] used. The prevalence of mastitis was high as to cause a substantial economic loss to farmers. In conclusion, microbiological and epidemiological surveillance is necessary for effective treatment and control of the disease. Hence, prevention and control of ssmastitis needs to be instituted.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/3559
dc.language.isoenen_US
dc.subjectPREVALENCE,en_US
dc.subjectStaphylococccus,en_US
dc.subjectaureus,en_US
dc.subjectISOLATED,en_US
dc.subjectBOVINE,en_US
dc.subjectMASTITIS,en_US
dc.subjectMILK,en_US
dc.subjectZARIAen_US
dc.titlePREVALENCE OF Staphylococccus aureus ISOLATED FROM BOVINE MASTITIS MILK IN ZARIAen_US
dc.typeThesisen_US
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