The Epidemiological Investigation And Drug Resistance Analysis Of Cow Mastitis In Tianjin Regions

Cow mastitis is one of the most common diseases that caused tremendous losses to dairy farmingindustry of China. Epidemiological investigation was conducted by Tianjin institute of animalhusbandry and veterinary in2004. The epidemic trend and pathogeny of cow mastitis has beeninevitably changed over the past decade. As a result, drug therapy and drug resistance should bechanged correspondingly. An investigation was conducted to clear the epidemic situation and the mainpathogenic bacteria of cow mastitis in Tianjin regions, then the drug resistance test was performed toprovide scientific basis for further research.In2004, Tianjin institute of animal husbandry and veterinary has for more than30dairy and dairyfarming community of20369cows mastitis epidemiological survey, the results showed that theincidence of clinical mastitis type was22.08%, the subclinical mastitis morbidity was61.57%, and after10years,1942dairy cows were tested with the methods of clinical examination and CMT to investigatethe epidemic situation of cow mastitis in Xiqing, Beichen, Ninghe, Baodi and Wuqing regions. Resultsshowed that the incidence of clinical mastitis and subclinical mastitis’s were9.27%and50.72%respectively. Annual incidence from2004have varying degrees of decline,especially the clinical type ofdairy cow mastitis.We found that the positive rate of the front mammary gland is higher than the backmammary gland. This maybe relevant with dung and urine pollutants. No significant difference wasfound between the left mammary gland and the right mammary gland. The morbidity is higher in thethird and fourth quarters. This phenomena mainly related to the pathogens’ suitable environment—hightemperature, large rainfall and high humidity. The incidence of cow mastitis is differentamong different fetal times. Along with aging, fetal times increasing, milk yield increasing, the burdenof the udder was continuously increasing. The cow were more susceptible to the pathogens with therelaxation of papillary sphincter, directly causing the increase of mastitis incidence.50milk samples were collected form cows suffered from clinical mastitis. Isolation andidentification results shows that the main pathogenic bacteria were staphylococcus aureus, escherichiacoli, streptococcus agalactiae, streptococcus dysgalactiae, streptococcus uberis, staphylococcusepidermis and staphylococcus epidermidis successively.Drug sensitive test was performed with73isolated bacteria strains. Results shows that the isolatedstrains have varying degrees drug resistance to most antibiotics. The isolated strains have a highresistance to penicillin, streptomycin the percentage were60%～100%, followed by Ciprofloxacin,cefalexin and Gentamicin. This investigation results help to prevent and control cow mastitis in Tianjinregions.Therefore, in the control of dairy cow mastitis milk from environmental, health, the milkingmachine cleaning and disinfection and maintenance, breeding management, adhere to the principle of"prevention first, is worth a pound of cure", in order to reduce the occurrence of dairy cow mastitis.