AIMS: Recent evidence suggests that the human gastric microbiota is much more diverse than previously thought. The aim of this study was to assess the potential for isolating lactobacilli from the human stomach. METHODS AND RESULTS: Lactobacilli were selectively cultured from gastric biopsies from 12 patients undergoing routine endoscopy. Lactobacilli were present in four of 12 biopsies. We isolated, in total 10 different strains representing five species (Lactobacillus gasseri, L. fermentum, L. vaginalis, L. reuteri and L. salivarius). The 10 isolates varied greatly in their ability to inhibit the growth of two Gram-positive bacteria and two Gram-negative bacteria. Furthermore, the acid and bile resistance profiles of the 10 isolates spanned a wide range. CONCLUSIONS: Five different Lactobacillus species were cultured from human gastric biopsies for the first time. SIGNIFICANCE AND IMPACT OF THE STUDY: Diverse Lactobacillus species are more prevalent in the human stomach than previously recognized, representing an untapped source of bacteria with beneficial probiotic and/or biotechnological properties.
AIMS: Recent evidence suggests that the human gastric microbiota is much more diverse than previously thought. The aim of this study was to assess the potential for isolating lactobacilli from the human stomach. METHODS AND RESULTS: Lactobacilli were selectively cultured from gastric biopsies from 12 patients undergoing routine endoscopy. Lactobacilli were present in four of 12 biopsies. We isolated, in total 10 different strains representing five species (Lactobacillus gasseri, L. fermentum, L. vaginalis, L. reuteri and L. salivarius). The 10 isolates varied greatly in their ability to inhibit the growth of two Gram-positive bacteria and two Gram-negative bacteria. Furthermore, the acid and bile resistance profiles of the 10 isolates spanned a wide range. CONCLUSIONS: Five different Lactobacillus species were cultured from human gastric biopsies for the first time. SIGNIFICANCE AND IMPACT OF THE STUDY: Diverse Lactobacillus species are more prevalent in the human stomach than previously recognized, representing an untapped source of bacteria with beneficial probiotic and/or biotechnological properties.
Authors: Constantina Bakolitsa; Abhinav Kumar; Dennis Carlton; Mitchell D Miller; S Sri Krishna; Polat Abdubek; Tamara Astakhova; Herbert L Axelrod; Hsiu Ju Chiu; Thomas Clayton; Marc C Deller; Lian Duan; Marc André Elsliger; Julie Feuerhelm; Slawomir K Grzechnik; Joanna C Grant; Gye Won Han; Lukasz Jaroszewski; Kevin K Jin; Heath E Klock; Mark W Knuth; Piotr Kozbial; David Marciano; Daniel McMullan; Andrew T Morse; Edward Nigoghossian; Linda Okach; Silvya Oommachen; Jessica Paulsen; Ron Reyes; Christopher L Rife; Henry J Tien; Christina V Trout; Henry van den Bedem; Dana Weekes; Qingping Xu; Keith O Hodgson; John Wooley; Ashley M Deacon; Adam Godzik; Scott A Lesley; Ian A Wilson Journal: Acta Crystallogr Sect F Struct Biol Cryst Commun Date: 2009-10-27
Authors: Kvin Lertpiriyapong; Mark T Whary; Sureshkumar Muthupalani; Jennifer L Lofgren; Eric R Gamazon; Yan Feng; Zhongming Ge; Timothy C Wang; James G Fox Journal: Gut Date: 2013-06-28 Impact factor: 23.059