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Abstract
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Article Information:
A Cross Sectional Study on the Prevalence of Sub Clinical Mastitis and Associated Risk Factors in and Aronund Gondar, Northern Ethiopia
Nibret Moges, Yilikal Asfaw and Kelay Belihu
Corresponding Author: Nibret Moges
Submitted: 2011 November, 09
Accepted: 2011 December, 09
Published: 2011 December, 25 |
Abstract:
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A cross sectional study was conducted on 322 local (n = 57) and crossbred (n = 265) lactating hand
milked small holder cows in and around Gondar. The objective of the study was to determine prevalence of
clinical and sub clinical mastitis and the associated risk factors by clinical examination and using california
mastitis test. Bacterial culture was also conducted to determine the casual agents of mastitis. The prevalence
of clinical and sub clinical mastitis in the study area was 0.93 and 31.67%, respectively with an overall
prevalence of 32.6%. Out of 1288 quarters examined 164 were infected while 39 were blind. The number of
clinically and sub clinically infected quarters were 7 and 157, respectively. Several pyogenic bacteria have been
isolated from cases of sub clinical mastitis during the study period. The major bacteria isolated in this study
were Staphylococcus aureus, Streptococcus agalactiae and Streptococcus dysgalactiae with a prevalence of
16.5, 15.9 and 14.0%, respectively. Among the risk factors considered, breed, age, parity and stage of lactation
have been shown statistically significant (p<0.05) difference in the prevalence of mastitis. Sub clinical mastitis
in both breeds has been reported to be higher than clinical mastitis. The odds of occurrence of mastitis were
two times more likely in crossbreds compared to local zebu. The present study disclosed that high prevalence
of sub clinical mastitis and the occurrence Staphylococcus and Streptococcus spp. as dominant bacterial species
from mastitic milk of the study area. All the risk factors considered were significant effect on the prevalence
of mastitis. Appropriate control and prevention methods should be applied to reduce the prevalence and effect
of mastitis in dairy cows.
Key words: Bacterial isolate, clinical mastitis, prevalence, risk factors, sub clinical mastitis, ,
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Cite this Reference:
Nibret Moges, Yilikal Asfaw and Kelay Belihu, . A Cross Sectional Study on the Prevalence of Sub Clinical Mastitis and Associated Risk Factors in and Aronund Gondar, Northern Ethiopia. International Journal of Animal and Veterinary Advances, (6): 455-459.
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ISSN (Online): 2041-2908
ISSN (Print): 2041-2894 |
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