Isolation,identification and drug sensitivity of pathogenic bacteria causing dairy cattle mastitis in Linyi city

Objective To explore the main pathogenic bacteria causing dairy cow mastitis,identify the susceptivity of main pathogens to antibacterials in Linyi city,and provide scientific basis for the treatment of this disease.Method Pathogenic bacteria were isolated from the milk of cows suffered from mastitis and identified.Then drug sensitivity test was performed.Result 6 kinds of pathogenic bacteria(127 strains) were isolated from 115 milk samples.46 strains among them were Staphylococcus aureus(36.22 %),33 strains were Streptococcus agalactiae(25.98%),21 strains were Streptococcus dysgalactiae(16.53%),17 strains were Escherichia coli(13.39%),8 strains were Streptococcus uberis(6.3%),2 strains were Salmonellas(1.57%).The main pathogenic bacteria showed high sensitivity to Cefquinome,Levofloxacin.Conclusion The main pathogens causing dairy cow mastitis are Staphylococcus aureus,Streptococcus and Escherichial coli chosen based on in Linyi city.They are all highly sensitive to Cefquinome and Levofloxacin.Therefore,the drugs that treat dairy cow mastitis shall be chosen based on drug sensitivity test.