ISOLATION AND ANTIBIOGRAM OF ESCHERICHIA COLI, STAPHYLOCOCCUS AND STREPTOCOCCUSSPECIES FROMMASTITIC COWS IN ZARIA, NIGERIA

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dc.contributor.authorRAJI, Kuburat Bola
dc.date.accessioned2016-06-11T12:45:00Z
dc.date.available2016-06-11T12:45:00Z
dc.date.issued2014-11
dc.descriptionA THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILLMENT OF THE REQUIEMENTS FOR THE AWARD OF THE DEGREE OF MASTER OF SCIENCE IN VETERINARY MICROBIOLOGY DEPARTMENT OF VETERINARY MICROBIOLOGY, AHMADU BELLO UNIVERSITY, ZARIA NIGERIAen_US
dc.description.abstractThis study was conducted to isolate and identify mastitis causing organisms;E. coli,Staphylococciand Streptococci from mastitic cows in Zaria andto determine their antimicrobial susceptibility to commonly used antimicrobial agents and the role of some potential risk factors and management practices on the occurrence of mastitis in cows.Milk samples froma total of 472 quarters‟of125 white Fulani lactating cow herds were collectedin order to determine clinical mastitis (shown as slight swelling of affected quarters and changes in milk appearance) and subclinical mastitis(detected by CMT, for increase in somatic cell counts). The milk samples collected were cultured and isolated using different media for bacterial identification and confirmed by conventional biochemical test and microbact. The following bacteria were isolated from quarter milk samples at the respective rates;Staphylococcus species (Staphylococcus aureus 10.87%, Staphylococcusintermedius 13.04% Staphylococcus haemolyticus 8.70%, Staphylococcus chromogen 8.69%, Staphylococcushyicus3.3%and Staphylococcus xylosus32.60%), Streptococcus species (Streptococcus uberis,4.35%and Streptococcus bovis 1.08%) and E coli(17.40%).Isolationrates of clinical mastitis in herd, cow and quarter levels were 44%, 5.6% and 5.9%, respectively. Subclincal mastitis was found to be 66%, 11.2% and 11.86%, at herd, cow and quarter levels respectively. Among the pathogens isolated from mastitic milk, coagulase negative Staphylococcus species were the most frequently encountered (66.30%); theothers were Staphylococcus aureus(10.87%),Streptococcus species (5.35%) and Escherichia. coli(17.40%) The bacteria isolated exhibited multiple drug resistance. Staphylococcus aureus exhibited 90% resistance to ampicillin and 100% to penicillin. Staphylococcus xylosus showed 80 % and 90%resistanceto ampicillin and vii penicillin.E coliexhibited 100%, 62.5% 56.4% resistantto ampicillin, tetracycline and gentamicin respectively.Streptococcus uberis showed 75% resistance to tetracycline and 25% resistance to gentamicin. Among the risk factors considered, lesion on teat, stage of lactation and parity number had no statistical significance associations(p>0.05) to prevalence of subclinical mastitis. In conclusion, the bacteria lsolated were the most probable causesof the mastitis seen and they exhibited multiple and different antimicrobial resistance patterns.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7975
dc.language.isoenen_US
dc.subjectISOLATION,en_US
dc.subjectANTIBIOGRAM,en_US
dc.subjectESCHERICHIA COLI,en_US
dc.subjectSTAPHYLOCOCCUS,en_US
dc.subjectSTREPTOCOCCUSSPECIES FROMMASTITIC COWS,en_US
dc.subjectZARIA,en_US
dc.subjectNIGERIAen_US
dc.titleISOLATION AND ANTIBIOGRAM OF ESCHERICHIA COLI, STAPHYLOCOCCUS AND STREPTOCOCCUSSPECIES FROMMASTITIC COWS IN ZARIA, NIGERIAen_US
dc.typeThesisen_US
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