Effect of Mastitis Pathogens on Milk Parameters in Subclinical Mastitic Ewes
Abstract: SUMMARY:
A total number of 126 milk samples of half udder from lactating ewes suffering from decreased milk yield at private farm in Egypt consistuted the materials of this study. The samples were collected for bacteriological examination, Somatic Cell Count (SCC) and milk constituents. The prevalence of subclinical Intra-Mammary Infection (IMI) of milk samples was 39.7 %. S. aureus was the most prevalent organisms (17.5 %) followed by coagulase negative staphylococci (CNS) ( 9.5%) , E.coli (8.7%) and Str. dysgalactiae (4%). There is a good correlation between CMT and SCC according to the infectious status of the mammary halves of the examined ewes. In the absence of infection, CMT score was negative and the SCC ranged from 5-164 (xlO3) cells/ ml. with arithmetic mean (19.5 xlO3) cells / ml. In case of infection with minor pathogens , CMT score was ( ++) and SCC range from 200 -239 (xlO3) cells / ml. with arithmetic mean (279 xlO3) cells / ml. while with the major pathogen, the CMT score was ( +++ ) and SCC ranged from 494 - 2277 (xlO3) cells / ml. with arithmetic mean (1529.6 xlO3) cells / ml. The results of milk constituents revealed that fat %, lactose %, protein % , urea mg % , TS % and SNF% in normal ewes milk were 3.35 % , 4.86 % , 5.29 % , 55 mg %, 14.96 % and 11.58 %, respectively, while they were in subclinical mastitic ewes milk : 1.25 % , 4.31 % , 4.95 % , 58.2 mg % , 11.95 % and 10.48 %, respectively. The statistical analysis proved that there were significant decrease in fat %, lactose %, TS % and SNF% in mastitic milk than that in normal ewes milk but there were no significant difference in protein % and urea mg % in both normal and mastitic ewes milk.
Publication year 2002
Availability location معهد بحوث التناسليات الحيوانية - 5 شارع حدائق الأهرام - الهرم - الجيزة
Availability number
Organization Name
Author(s) from ARC
Agris Categories Animal physiology - Growth and development
AGROVOC
TERMS		 Ewes. Mastitis. Milk. Pathogens.
Publication Type Researsh & Applied Activities
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