The objective of the research conducted was to assess the potential growth and survival of selected probiotic strains in ripening meat products using an example of pork loins. The research material comprised raw pork loins and two probiotic strains Lactobacillus casei LOCK 0900 (Patent No.: P-382760) and Lactobacillus casei ŁOCK 0908 (Patent No.: P-382760). Three kinds of loin samples were analyzed in the experiment: two control samples (loins with and without 0.2% glucose additive), two samples with only Lactobacillus casei ŁOCK 0900 and ŁOCK 0908 probiotic strains added, and the samples with the probiotic strain and 0.2% glucose added. The loin samples prepared in this way ripened for 3 weeks at a temperature of 16°C. Then, the products analyzed were vacuum-packed and stored at 4° C during a period of 6 months. Three series of experiment were performed. Micro-biological analyses had to determine the count of lactic acid bacteria (LAB). They were made 3 weeks after the completion of the 3-week meat ripening process and 6 months after the storage of the vacuum-packed loins using TEMPO® (Biomerieux, France), i.e. an automated system of measuring the count of micro-organisms. It was found that the probiotic strains of Lactobacillus casei ŁOCK 0900 and ŁOCK 0908, added to the cured pork loins, grew and achieved a count of 10⁷ log cfu/g, and in the samples with the additive of 0.2% glucose, their count was 10⁸ log cfu/g. The count of probiotic bacteria in loins stored during a period of 6 months was by 1 to 2 log levels lower compared to the products after the ripening process, but this count was still high enough to consider those products to be probiotic.