AL-Qadisiyah Journal of Veterinary Medicine Sciences

Abstract

E.coli O111:B4 is predominant cause of E.coli mastitis in cattle in some areas of middean of Eupherates trough in Iraq

Qassim H.Kshash
Vet.Med-AL.Qadysia University Faisal G.Habasha
Vet.Med-Baghdad University Abul-Al-Khaliq
AL-Remmahy
Dent.Colloge-Baghdad University

Abstract
This study was included to examine (353) milk samples which were collected from normal and clinical mastitic cows from different areas in three governates in Iraq as 91 milk samples from Al-Najaf governate (Al-Bahrani state & villages of AL-Huryia township) , 128 milk samples from Al-Qadsyia governate ( villages of Nufer,Al-Seeder,Sumer& Al-Saniah townships and villages of Ghamass consituency ) and 134 milk samples from Babylon governate (villages of Al-Qassim township) ,and California Mastitis Test (CMT) was applied to detect the subclinical mastitis .
Out of 353 milk samples the total E.coli mastitis percentage (14.16%) , which included ( % 31.8) of clinical mastitis and (%8.3) of subclincal mastitis.
Echerichia coli mastitis incidence was not influenced by type of cows breed, while the age of cows were significantly affected on E.coli mastitis incidence and the higher E.coli mastitis incidence was recorded in cows at (8 years and over )% 19.4 more than other younger aged cows.
Cows at (1-30 days )post parturition were more susceptible to E.coli mastitis (% 20.14) rather than prolonged times after parturition .
E.coli mastitis was recorded in hindquarters of udder (right posterior , left posterior ) as % 32 ,% 22 respecticvely higher than in fore quarters .
E.coli was isolated and diagnosed from milk samples by using biochemical tests and API-20E system, then these E.coli strains were serotyped by using polyvalent sera in Central Public Health Lab. and E.coli O111:B4 was a predominate serotype .