[Streptococci and staphylococci in raw cow's milk on the market]

Studied were a total of 649 batches of raw cow milk produced on 42 farms, and 1100 flushing samples taken from 370 containers for the presence of pathogenic streptococci and staphylococci. It was found that 26.5 per cent, resp., 18.03 per cent of the batches contained coagulase-positive staphylococci and pathogenic streptococci (in 8.94 per cent--Str. agalactiae, in 6.0 per cent--Str. uberis, and in 3.08 per cent--Str. dysgalactiae ). In 28.3 per cent of the batches there were both strepto - and staphylococci that had pathogenic character. The study of the flushing material showed that the cleaning of containers for shipping the milk from the farms to the dairy processing enterprises was effective--only 1.62 per cent of the cisterns were contaminated with pathogenic strepto - and staphylococci.