Detection of subclinical mastitis in a dairy farm in Beni-Suef city, Egypt

الملخص EN

A total of 116 quarter milk samples were collected aseptically from apparently healthy udders of 29 cows in a dairy farm in Beni-Suef city, Egypt; for detection of subclinical mastitis using California mastitis test (CMT), somatic cell count (SCC), chemical and microbiological examination.

Thirteen cows (44.83%) were subclinically mastitic with 27 mastitic quarters (23.28%).The scores of CMT showed 11 quarters (40.74%) as +1 and 16 quarters (59.26%) as +2.

The SCC of fore left (FL) quarter milk samples was 4.3×105±1.2×105, while of fore right (FR) quarter milk samples was 3.8×105 ±1.1×105, but for SCC of hind left (HL) quarter milk samples was 2.4×105±9.5×104 and SCC of hind right (HR) quarter milk samples was 2.2×105±7.9×104.

The isolated micro-organisms from the examined milk samples were Staphylococcus aureus, Coagulase negative Staphylococci (CNS), Streptococcus spp, E.coli and Aspergillus fumigatus.

The present study assured that the indirect tests of subclinical mastitis are more suitable for selecting cows with intramammary infections for subsequent bacteriological sampling.