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Online Journal of Veterinary Research

Volume 24 (7):383-387, 2020.

Prevalence of clinical and subclinical mastitis in ewes with Staphylococcus aureus


Afaf Abdulrahman Yousif1, Khalid Mahmood Al Mashadani2


College(s) of Veterinary Medicine, 1University of Baghdad and 2University of Diala, Iraq.




Yousif AA, Al Mashadani KM., Prevalence of clinical and subclinical mastitis in ewes with Staphylococcus aureus, Onl J Vet Res., 24 (7):383-387, 2020. We report prevalence of mastitis and staphylococcus aureus in 100 lactating ewes in Baghdad, Iraq. Milk samples (n=194) were subjected to California mastitis test (CMT), somatic cell count (SCC) and S aureus antibiotics. By clinical examination we found 6 ewes but 12 milk samples with mastitis (~6.8%) with 33% S. aureus. By CMT 28 apparently normal milk (subclinical mastitis) samples tested positive (~27%) of which 9 had S. aureus. By SCC 27 ewes tested positive with more than 500,000 cells/ml all with S. Aureus. S. aureus were highly sensitive to cefotaxime (100%), Erythromycine (100%), Ciprofloxacin (100%) but less to Amikacin (94.1%), Ceftriaxone (88.2%), Oxacillin (88.2%) or Cephalexin (76.4%). Our results suggest that somatic cell counts over 500,000 may differentiate subclinical from clinical mastitis in ewes.

Key words: Mastitis , Staphylococcus, Antibiotic sensitivity test Staphylococcus aureus.