Clinical and subclinical mastitis of cows

Abstract

In this paper, the incidence rates of clinical and subclinical, as well as staphylococcal and streptococcal mastitis were examined in four farms with different rearing systems and milking hygiene procedures. Attained results have shown out that incidence rate of clinical mastitis vary from 3.12 to 8.33%. Comparing to clinical, substantiely greater the incidence rate of subclinical mastitis was found, which ranged from 17.19 to 30.00%. Thus clinical and subclinical cases of mastitis were higher on farm with tie system of rearing than the same forms on farm with loose system of cow rearing. The incidence rate of streptococcal mastitis ranged from 9.37 does 24.17%, whereas the occurrence of staphyloccal mastitis was between 10.94 and 15%. Higher incidence rate of staphylococcal and streptococcal mastitis were found on farm with tied system of rearing than the same etiological type of mastitis on farm with loose system of cow rearing. The results of our examination show lower occurrence of clinical and subclinical mastitis in the farm with free system of rearing and spraying disinfectant after milking, in contrary to farms with tied system, where after milking teat dipping or any disinfection were performed.

U radu se razmatra učestalost pojave kliničkih i subkliničkih, kao i stafilokoknih i streptokoknih mastitisa kod krava na četiri farme sa različitim sistemima držanja i higijenskim postupcima pranja i dezinfekcije vimena pri muži. Dobijeni rezultati pokazuju učestalost pojave kliničkih oblika mastitisa na farmama od 3,12 do 8,33%, i znatno veću učestalost pojave subkliničkih mastitisa (od 17,19 do 30,00%). Veća učestalost kliničkih i subkliničkih oblika mastitisa ustanovljena je na svim farmama krava na kojima se primenjuje vezani u odnosu na slobodni sistem držanja. Učestalost pojave streptokoknog mastitisa na farmama kretala se od 9,37 do 24,17%, dok je učestalost pojave stafilokoknog mastitisa iznosila od 10,94 do 15%. Veća učestalost stafilokoknih i streptokoknih oblika mastitisa ustanovljena je na farmama krava na kojima se primenjuje vezani sistem držanja. Rezultati ispitivanja u ovom radu pokazali su da je manja učestalost kliničkih i subkliničkih mastitisa utvrđena na farmi sa slobodnim sistemom držanja krava, gde se vrši raspršivanje dezinficijensa posle muže, za razliku od farmi sa vezanim sistemom držanja, gde se dezinfekcija posle muže ne vrši ili se dezinficijens aplikuje potapanjem papila vimena.