Epidemiology and Drug Resistance of Ovine Pasteurellosis in Selected Districts of Arsi Zone of Oromia Regional State, Ethiopia
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Date
2012-06-01
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Addis Ababa University
Abstract
This study was conducted from September 2011 to May 2012 in selected districts of Arsi Zone of
Oromia Regional State with the objectives of determining the epidemiology of M.haemolyfica,
P.mullocida and B.trehalosi through studying their isolation rates among different contributing
host and environmental risk factors. Moreover, the efficacy of Tetracycline, Penicillin,
Amoxicillin and Gentamicin against representative isolates was determined. A total of 384 local
sheep were examined and 109 isolates were identified. 65 isolates (59.6%) of the total isolates
were M.haemolytica, 33 isolates (30.3%) P.multocida and 11 isolates (10.1 %) were B.trella/osi.
The distribution of general positives among different age groups of sheep were found varying
significantly (P<0.05) while their distribution across study districts, agroecological zones of
study area, sex, health status, treatment condition and stock rates of sheep varies but
insignificantly. Antibiotic efficacy results showed that M. haemolytica isolates were resistant to
Penicillin (33% of the tested isolates) while susceptible to Amoxicillin (all tested isolates) and
Gentamicin and Tetracycline (67% of isolates). P. multocida isolates were also resistant to
Penicillin (33% of the tested isolates) and Tetracycline (67% of the isolates) but susceptible to
Amoxicillin (all tested isolates) and Gentamicin (67% of tested isolates). The results of this study
indicate that Gentamicin and Amoxicillin are drugs of choice relative to Penicillin and
Tetracycline.
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Keywords
Amoxicillin, Arsi, B.trehalosi, Gentamicin, M.haemolytica, Penicillin, P.multocida, Sheep, Tetracycline