[Distribution and forms of latent mastitis in cows].

A study on the distribution of symptomless mastitis in cows on its forms and onthe percentage involvement of the individual microorganisms isolated in the positively reacting cases was carried out including clinical, cytological and microbiological investigations. The study covered 8 cow farms with a total number of 2377 cows. It was established that 68.42% of the cows suffer from symptomless mastitis and 24.09% of the udder quarters. In 32.39% of the latter cases non-specific mastitis or the so called secretory disturbance was observed, while in 67.61%--bacterial mastitis, which in 50.75% had a subclinical course, while in 17.36--as latent infection. In the samples with pathogenic microorganisms 72.35% had staphylococci, 14.32%--micrococci, 8.39%--streptococci and the remaining 4.94%--other kinds of bacteria. The appearance and distribution of symptomless mastitis in cows is the result of bad management of cow rearing and use.