The effect of lactobacillus cell size on its probiotic characteristics.

In this study, 10 Lactobacillus strains including L. sakei, L. reuteri, L. delbrueckii subsp. lactis, L. delbrueckii subsp. delbrueckii, L. plantarum, L. acidophilus, L. rhamnosus, L. paracasei, L. salivarius, and L. gasseri were characterized by cell morphology and growth properties. The strains were then examined in terms of some probiotic characteristics including resistance to acid and bile conditions, ability to adhesion to intestinal epithelial cells, antioxidant activity, aggregation characteristics, antibacterial activity, hemolytic activity, and resistance to different antibiotics. Correlations between different quantitative features were analyzed using Pearson's coefficient (r). Results of this study provided first-time evidence for the effects of cell length on probiotic features. Based on statistical analysis, long Lactobacillus strains had often higher antioxidant and aggregation activities. Moreover, these long strains were usually more sensitive to acid and bile conditions and resulted in a lower CFU yield compared to short strains. By conducting morphological tests at the first step of screening, some strains would gain higher priority because of predicting a high performance in some of the desired characteristics. Therefore, the cost and time required for the subsequent tests would be significantly reduced. PMID: 31525452 [PubMed - as supplied by publisher]
Source: Anaerobe - Category: Microbiology Authors: Tags: Anaerobe Source Type: research