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《Modern Agricultural Sciences and Technology》 2011-11
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Identification of Pathogenic E.coli from Postweaning Diarrhoea and Its Serotypes

FENG Xian GUAN Miao-dong(Wenling City Animal Husbandry and Veterinary Bureau in Zhejiang Province,Wenling Zhejiang 317500)  
Rectum swabs samples from postweaning diarrhoea were collected from large pig farms in zhejiang province.56 pathogenic E.coli isolates were obtained after selective medium culture,Gram stain,biochemical tests,and toxicity tests in mice.Serotypes of 33 isolates were identified by agglutination tests with 11 O antigen standard antiserums,the predominant serotypes were O149、O139、O8.,amount to 51.52%(17 isolates)of all the isolates identified.37 strains were identified as K88 using fermentation tests of raffinose,MRHA and MRHI(K88ab,8 strains,21.62%),the rest isolates serotypes couldn't be identified when using 4 standard antisera(K88,K99,987P,F41).These serotypes are different from the common ones reported before.
【CateGory Index】: S858.28
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