Development of Technology for the production of finished forms of Medicinal probiotics

Abstract

The study aimed to develop a technology for the production of a finished form of medicinal probiotic agents against human intestinal infections based on active strains of lactic acid and propionic acid bacteria with a wide range of biological activity and resistance to antibiotics. From the laboratory collection of lactic acid and propionic acid bacteria isolated from the intestines of healthy people, two associations of bacteria were compiled with antagonism against test cultures of Staphylococcus aureus, Salmonella gallinarum, Mycobacterium B5, Candida albicans, Pasteurella multocida, Bacillus subtilis, Escherichia coli 8739, Klebsiella pneumoniae ATCC 700603 and ATCC BAA 2524, Staphylococcus aureus 3316 and 9, Salmonella enteritidis 35382, and Pseudomonas aeruginosa 835, as well as the ability to produce hydrolytic enzymes amylase and proteinase, B vitamins, and essential amino acids. The resistance of the selected associations of lactic acid and propionic acid bacteria to the used antibiotics has been studied, which will allow for using them, if necessary, in the complex therapy of diseases. Technology for the production of probiotic medication from these associations has been developed. It was found that the most active preparation in terms of bacterial titer and antagonistic activity and the most stable one during storage for 6 months was the liquid preparation obtained by growing association No. 2 (L. plantarum 2v/A-6+L. brevis B-3/A-26+L. acidophilus 27w/60+P. shermanii 8) on nutrient medium No. 1 (De Man, Rogosa and Sharpe agar with CoCl2) using 7% sucrose and 1.5% gelatin as a protector. The liquid preparation from association No. 5 grown on medium No. 1 showed a more complete preservation of production-valuable signs during storage compared to the results of using nutrient medium No. 4, while the use of protector No. 1 was more optimal. To test the stability during the storage of dry preparation forms, an accelerated method was used by warming them up for 15 minutes at 60°C. It was found that after warming up, the best preservation of viable bacterial cells was observed in association No. 2 on nutrient media No. 1 and No. 4, in association No. 5 on medium No. 4 dried with protector No. 2 (7% sucrose and 1.5% gelatin + 7% skim milk powder), while the titer of bacteria was equal to 1.2×109, 3.5×108, and 2.0±0.2×108 colony-forming units/g, respectively. Antagonistic activity in these association variants was observed against all test cultures taken into the study with zones of suppression of their growth ranging from 10 to 24 mm.