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Abstract

AEROBIC BACTERIA ASSOCIATED WITH SUBCLINICAL MASTITIS IN EWES AND GOATS IN IN El NUHUD CITY IN WEST KURDOFAN STATE, SUDAN

El Ayis A. Abubaker*

ABSTRACT

This study was conducted out in El Nuhud city in West Kordofan State (Sudan), during the year 2019. In this study a total of 105 milk samples (49 from ewes and 56 from goats) were collected from El Nuhud city in West Kurdofan State in Sudan. Samples were subjected for California Mastitis Test (CMT). A total of 13 (26.5%) ewes' milk samples and a total of 27 (48.2%) goats' milk samples were found to be positive for CMT. Samples’ positive for CMT were subjected for bacteriological examination and the isolated bacteria were subjected for further confirmation by using API staph, API strep20 and Api20E identification rapid systems. According to cultural characteristics, bacterial morphology, biochemical reactions results, and API rapid systems results, a total of 20 bacterial isolates were isolated from ewes’mastitic milk samples. Staphylococci isolated from ewes' milk samples represented 60.0%, streptocci 20.0% and E. coli 20.0% of the isolated bacteria. Staphylococci species isolated from ewes’ mastitic milk included Staphylococcus aureus (50.0%), S. xylosus (16.7%), S. chromogenes (16.7%) and S. epidermidis (16.7%). Coaggulase negative saphylococci (CNS) represented 50.0% of the total staphlococci isolates. Streptococci species isolated from ewes’ mastitic milk included Streptococcus dysagalactiae (50.0%), Str. pneumoniae (25.0%) and Str. ubris (25.0%). A total of 27 bacterial isolates were isolated from goats’mastitic milk samples. Staphylococci isolated from goats’mastitic milk samples represented 80.0%, streptocci 15.0% and E. coli 5.0% of the isolated bacteria. Staphylococci species isolated from goats’mastitic milk included Staphylococcus aureus (81.5%), S. chromogenes (11.1%) and S. epidermidis (7.4%). Coaggulase negative saphylococci (CNS) represented 18.5% of the total staphlococci isolates. Streptococci species isolated from goats’mastitic milk included Str. pneumoniae (50.0%) and Str. ubris (50.0%). 80% of bacteria isolated from ewes’ samples were also isolated from goats’ milk samples. This may indicates that, the same aetiology may be implicated in the cases of subclinical mastitis in ewes and goats.

Keywords: Staphylococcus aureus, S. xylosus, S. chromogenes and S. epidermidis.


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