摘要:Summary The frequency of contamination of bovine and pig carcasses (n=200) by enterobacteria (Escherichia coli and Salmonella spp.) was researched in a large abattoir in the Republic of Croatia. Salmonella species were not determined in smears from bovine and pig carcasses, whereas 4% of bovine and pig carcasses were contaminated by E. coli bacteria. The conducted research determined that efficiency of procedures in proving contamination is very good and it provides high protection of consumers. Also, a high efficiency of the proscribed microbiological monitoring was proved in a routine hygienic program in the abattoir.