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OJVRTM
Online Journal of Veterinary Research©
Volume 25(1): 15-21, 2021.
Clinical and sub-clinical prevalence of Staphylococcus aureus mastitis and
antibiotic resistance by udder halves in ewes.
Afaf
Abdulrahman Yousif1, Khalid Mahmood Al Mashadani2
1College of Veterinary
Medicine, University of Baghdad, 2College
of Veterinary Medicine, University of Diala, Iraq.
ABSTRACT
Yousif
AA, Al Mashadani KM., Clinical and sub-clinical prevalence of
Staphylococcus aureus mastitis and antibiotic resistance by udder halves in
ewes, Onl J Vet Res 25 (1);15-21, 2021. Incidence
of clinical and sub-clinical mastitis by Staphylococcus aureus in lactating
ewes is reported. California mastitis (CMT), somatic cell count (SCC),
bacteriology and antimicrobial sensitivity tests were done to verify mastitis
in 100 milk samples. Six ewes had acute mastitis in
12 halves of which 2 were positive to S. aureus. Fifty two
samples from 28 ewes were positive to CMT and 14
samples from 5 with 2 halves infected and 4 with 1 halves infected had Staphylococcus
aureus. The 14 samples with S aureus were also CMT positive. Prevalence
for subclinical mastitis was 26.9% by CMT. Fifty milk samples from 27 ewes consisting of 23 with 2 halves infected
and 4 with 1 half affected had SCC of > 500,000 cells /ml.
Samples with Staphylococccus
aureus had high SCC values. S.
aureus were highly sensitive to cefotaxime, erythromycin
and ciprofloxacin (100%) but less to amikacin (94.1%), ceftriaxone (88.2%), oxacillin
(88.2%) and cephalexin (76.4%).
Key words: Sub clinical mastitis,
Staphylococcus, udder, antibiotic sensitivity.
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