Zizet Zakaria Zareh <br/><br/>
Evaluation of different methods used for diagnosis of bovine subclinical mastitis and determination of the udder immuno response against it /  
 تقييم الطرق المختلفة المستخدمة فى تشخيص التهاب الضرع تحت الاكلنينكى فى البقر وتحديد الاستجابة المناعية للضرع ضد المرض 
Zizet Zakaria Zareh ; Supervised Sabry Aziz Barsoum , Adel Fayek Farid 
 - Cairo :   Zizet Zakaria Zareh ,   2015 
 - 95 P. :   facsimiles ;   25cm 
<br/><br/>Thesis (Ph.D.) - Cairo University - Faculty of Veterinary Medicine - Department of Internal Medicine and Infection Disease 
<br/><br/> A total of 450 milk samples were collected from apparently normal of udder Friesian lactating cows were investigated for subclinical mastitis. These animals were subjected to California Mastitis (CMT), Electric conductivity (ECT) and pH indicator paper (pHI) tests. Milk whey were prepared from the positive reactors as well as another 50 samples from negative subclinical cases used as control were subjected to Catalase, Nitric oxide, Lysozyme and Electrophoresis determinations. Bacterial examinations of 166 quarter milk samples that reacted positively to different field screening tests used to evaluate the efficiency tests and detect its sensitivity. The results showed that 6.2%, of examined cows and 3.2 % of examined quarter were positive for CMT with different scores. While 8% of the examined cows and 3.8% of the quarters reacted positively to ECT with conductivity of 9 m/sc. or more 
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<br/><br/><label>Subjects--Index Terms: </label>E. coli  Environmental mastitis  Subclinical mastitis