Abstract:
Prevalence of mastitis and their antimicrobial resistance in Amtali (sub-district) area of
Barguna District were studied. Mastitis was diagnosed by examining the udder and milk
of 300 dairy cows. The bacteria were cultured and biochemical tests and antimicrobial
profiling were done. The overall prevalence of mastitis was 5.0%, and cross-bred and local
cows had 6.4% and 3.8%, respectively. The prevalence was higher in animals 7 - 8 years
old (5.9%) and in cows of 3
rd
- 4
parity (8.8%). Cows with peri-parturient diseases and
1
st
- 2
nd
th
lactation had prevalence of 6.8% (P<0.05) and 5.7%, respectively. The prevalence in
dry and wet seasons was 33.3% and 66.7% (P<0.10), respectively, and 53.3% of cows were
affected with mastitis when the floor was wet and soiled. The prevalence was 73.3%
(P<0.05) in unhygienic conditions. The prevalence of E. coli and S. aureus in mastitis milk
samples was 73.3% and 66.7%, respectively. E. coli was sensitive to amoxicillin (36.4%),
ampicillin (36.4%), tetracycline (54.6%), streptomycin and co-trimoxazole (81.8%),
gentamicin & ceftriaxone (90.9%), cefuroxime and cefixime (100%). S. aureus was sensitive
to co-trimoxazole (60%), tetracycline (70%), amoxicillin, ampicillin, streptomycin (80%),
gentamicin, ceftriaxone (90%), cefuroxime and cefixime (100%). (Bang. vet. 2024. Vol. 41,
No. 1 – 2, 13 – 22)
