Isolation of nocardia organisms from soil and mastitic milk of dairy cows (friezian and holestein) on different media on some governomental farms in Assiut governorate [electronic resource].

Includes references.

This study was carried out on 36 milk samples that were taken from dairy cows clinically affected with mastitis and 72 soil samples were taken from soil of some Governomental dairy farms in Assiut Governorate. Bacteriological examination of the mastitic milk samples revealed that 9(25%), and 12(18.66%) culturally positive for Nocardia species. The main bacterial isolates were Nocardia asteriodes where it was isolated with an incidence 7(19.44%) from mastitic milk samples and 8(11.11 %) from soil samples. The maximum growth of Nocardial species on 3 different utilized media trypticase soya agar, blood agar and Sabourad dextrose agar were found superior on blood agar, where the number of isolated strains on blood agar from milk samples were 9 isolates (25%), on trypticase agar 8 (22.30%) and SDA 6 (16.70%). In case of soil samples the isolated strains of Nocardia on the same 3 utilized media were 12 (16.66%), 12 (16.66%) and 10(13.90%) respectively.

Summary in Arabic.