Studies On The Cow Mastitis And Environment Pathogenic Bacterias Of An Intensive Cow Farm

In this experiment ,47 milk samples of the cow and 65 environmental samples were picked according to the incidence of dairy cow mastitis in the intensive stockbreeder pastoral of the north in each season(summer, autumn, winter)and had conducted the separation and determination of the bacteria.And then their main pathogenic bacteria conducted drug sensitivity test, pathogenic test and the research.of relevance.The result of the separation and determination of pathogenic bacteria, 77 strains of 10 kinds were separated from 47 milk samples of the cow in summer, 69 strains of 8 kinds were separated from 65 environmental samples;49 strains of 10 kinds were separated from 47 milk samples of the cow in autumn, 52 strains of 7 kinds were separated from 65 environmental samples; 81 strains of 13 kinds were separated from 47 milk samples of the cow in winter,42 strains of 8 kinds were separated from 65 environmental samples. According to statistics above the separated bacterial strain,the result showed that Escherichia coli, staphylococcus aureus, streptococcus were main pathogenic bacteria from the milk of the cow and environment.Main pathogenic bacteria were conducted drug sensitivity test with 27 antibiotics,the result showed that Main pathogenic bacteria in milk and environment were more sensitive to gentamycin, cephalosporin and quinolone. However,Pathogenic bacterias of this two kinds of samples produced different levels of drug resistance to novobiocin, aztreonam,rifampicin penicillin, streptomycin, sulfa drugs.Synthesizing the results about the separation and determination.In addition,There was no obvions difference between Pathogenic bacterias of milk samples and environmental samples by variance analysis.we could conclude that the cow mastitis had the direct relation with the environment of the cow farm.