Prevalence and public health hazard of subclinical mastitis in goats and sheep in Assiut governorate.

摘要

The study was conducted to determine the prevalence of subclinical mastitis (SCM) in goats and sheep using screening tests and microbiological examination. 395 milk samples collected from 100 healthy goats (n=197 milk samples) and 100 ewes (n=198 milk samples) from Assiut Governorate, Egypt were analysed. Results revealed that 34.52 and 9.60%, and 34.01 and 9.60% goats and ewes were positive under California Mastitis Test and Modified Whiteside Test, respectively. It was observed that 44 and 14% goats and ewes were positive under California Mastitis Test and Modified Whiteside Test, respectively. Bacteriological and mycological examinations of milk samples showed that 15.23 and 8.08%, and 1.02 and 0% goats and ewes were positive, respectively. 27 and 12%, and 2 and 0% goats and ewes were positive under bacteriological and mycological examinations, respectively. The most predominant species isolated in goats and ewes was Staphylococcus aureus at 6.60 and 4.04%, respectively, followed by coagulase negative staphylococci, Streptococcus pyogenes, Streptococcus agalactiae, Escherichia coli, Klebsiella pneumoniae and Enterobacter sp. at 6.09 and 4.55%, 1.02 and 0.51%, 1.02 and 1.01%, 1.02 and 0.51%, 0.00 and 0.51% and 4.06 and 1.52%, respectively. Aspergillus fumigatus and Aspergillus terreus were isolated from goat milk, but none were isolated from ewe milk. It is suggested that California Mastitis Test and Modified Whiteside Test are sensitive for the detection of subclinical mastitis in goats and ewes.