EN
There were compared microbiological indices of 20 milk raw materials taken at random from the large scale cowsheds and 20 samples from the stations of individual deliverers. The microorganisms were found in the amount of 32.5X10® and 17.5X10®/1 ml respectively. The titer of E. coli was 10—4 (40%h) or 10—2 (30%), enterococi 10~3 (75%), 10-3 (50%), and staphylococci in 90% and 65% of the samples. The higher number of acidophylic, caseolytic and psychrotrophic microflora was noted in the raw materials of individual deliverers. The results of microbiological examinations were not in agreement with the healthy state of cows from the large state farms. The control of mastitis showed that: a) 74.5% cows was free from udder diseases, b) 8.55% suffered from subclinical diseases and 14.5% from aseptic forms of mastitis. The yield of milk was increasing every year and it was 30531 in 1983 and 37691 in 1988. The results indicate that a lack of market mechanisms in respect to milk production does not influence profitably the effects of the control of mastitis in cows. The healthy state of udders in cows of individual farms expressed by positive Whiteside’s test was 85% and in the comparable group — 40%.