Feasibility Study of Lactic Acid Bacteria Isolated from the Chashca Totoras Primary Forest Soil

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D, Moya Guerra, C, Flores Mancheno, V, González Cabrera, I, Salgado Tello

Abstract

The main objective was to study the viability of the bacteria Lactobacillus malefermentans, Lentilactobacillus parakefiri and their mixed culture that have been previously isolated from the soil of the primary forest Cashca Totoras using quinoa malt extract as substrate, for which the physical-chemical characterization of the malt extract and a plate count to determine the CFU of each bacterium was performed, applying a completely randomized design with separation of means through Tukey (p < 0.05), giving as a result at 96 hours growth of 3x109UFC/ml for L. malefermentans being the best compared to the other treatments since it presents a greater quantity of UFC, as far as the specific speed of growth and the biomass yield were 0.05 h-1 and 0.12 g/L respectively, therefore, it is concluded that the quinoa malt extract is a culture medium capable of providing the necessary nutrients for the development of the bacteria. Using this bacterium in the elaboration of functional beverages is recommended since its viable count is higher than 107 CFU/ml.

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