EN
The results of microbiological analysis of 40 215 samples of milk and milk products examined in veterinary laboratories in 1994-1996 are described. It was found that 17.7% of examined samples did not meet the requirements of Polish Standards in regard to microbiological criteria. The main factors causing sample disqualifications were bacterial contamination and coliform bacteria which result from the low level of hygiene of milking and milk processing in dairy plants. In 1996, the results of examination of bacterial contamination of raw milk were analysed. The results indicated that only 58.6% of milk samples from individual producers and 63.3% of collected milk samples meet first class requirements. The results of the detection of inhibitory substances in raw milk and milk products are also described. These substances were detected in official examinations carried out by the Veterinaiy Sanitary Inspection and in two monitoring testing programs. The results confirmed a relatively high level of contamination of milk by inhibitory substances.