Low-cost culture media designed for biomass production of beneficial lactic acid bacteria for their inclusion in a formula to treat bovine reproductive infections

MIRANDA, MARIA HORTENCIA; NADER, MARÍA ELENA FÁTIMA

FEMS MICROBIOLOGY LETTERS

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2023 vol. 370 p. 1 - 6

0378-1097

As a first step for the use of probiotics in a formula for cattle, it is required to have available low-cost culture medium(s) and efficientproduction conditions for the growth of probiotic bacteria and high production of cell biomass. De Man–Rogosa–Sharpemedium, usedfrequently for lactic acid bacteria (LAB) contains adequate ingredients for their growth but is very expensive for industrial application.The nutrients required for LAB growth are strain-dependent. In this work, traditional culture media were evaluated omitting and/ormodifying ingredients in their composition, as carbon or nitrogen source, on the basis of their low-cost industrial waste, to selectthose supporting the most efficient growth. The results showed that the formulation of culture media containing fructose (0.5%)and molasses (1.0%) was better for the growth and production of cell biomass for all the strains assayed, except Lactobacillus gasseriCRL1421 growing in 1.5% corn syrup. FM902 yeast extract at concentrations between 1.5% and 2.5% was the most adequate formost ofthe strains. The LAB grown in the designedmedia maintained the beneficial properties for which they selected. The use of the culturemedia designed to produce biomass decrease production costs, which is an important step for the feasible industrial production of probiotic formulas