TY  - JOUR
T1  - Study on Bovine Mastitis in Dairy Farms of Bahir Dar and its Environs
AU - Bitew, Molalegne AU - Tafere, Arega AU - Tolosa, Tadele 
JO  - Journal of Animal and Veterinary Advances
VL  - 9
IS  - 23
SP  - 2912
EP  - 2917
PY  - 2010
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2010.2912.2917
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2010.2912.2917
KW  - CMT
KW  -etiological agents
KW  -lactating cow
KW  -mastitis
KW  -prevalence
KW  -Bahir Dar
KW  -Ethiopia
AB  - Cross-sectional study was conducted on a total of 302 lactating (local and crossbred) dairy cows to determine the overall prevalence of mastitis and to isolate and identify the predominant bacterial agents involved in Bahir Dar town and its environs using Californian Mastitis Test (CMT) as screening tests. The overall mastitis prevalence recorded in the area was 85 (28.2%), out of which 9 (3%) clinical and 76 (25.2%) were subclinical cases. Of 1208 quarters examined, 23 (1.9%) were blind teats and 134 quarters (12.3%) showed evidence of infection of sub clinical mastitis. About 79 bacterial isolates were identified from CMT positive samples. Among the isolates were Coagulase Negative Staphylococci (CNS) (51.9%), <I>Staphylococcus aureus</I> (20.3%), <I>Streptococcus agalactiae </I>(8.8%), <I>Corynebacterium bovis </I>(0.75%) and <I>Bacillus</I> species (0.75%). Other species isolated include <I>Streptococcus dysagalactiae </I>(5.1%), <I>Micrococcus</I> species (3.8%), <I>Streptococcus uberis </I>and <I>Actinomyces pyogenes </I>(2.5%) each. The occurrence of mastitis varied significantly (p&lt;0.05) between crossbred 61 (36.7%) and local Fogera 24 (17.6%). The prevalence of mastitis also significantly differed between animals with udder/or teat lesion, hygiene and parity number (p&lt;0.05) in both breeds. There was no significant differences (p&gt;0.05) between lactating cows with lactation stages in local Fogera breeds but it was significant (p&lt;0.05) in crossbreds. The study showed that mastitis is the problem of dairy cows in the study area and the major isolates were contagious pathogens therefore, hygienic milking practice, culling of chronically infected cows and hygienic practices in the environment should be followed.
ER  -