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Persistence of Lactobacillus fermentum RC-14 and Lactobacillus rhamnosus GR-1 but Not L. rhamnosus GG in the Human Vagina as Demonstrated by Randomly Amplified Polymorphic DNA

鼠李糖乳杆菌 发酵乳杆菌 益生菌 阴道 微生物学 生物 乳酸菌 泌尿生殖系统 细菌 解剖 乳酸 遗传学 植物乳杆菌
作者
Gillian E. Gardiner,Christine Heinemann,Andrew W. Bruce,Dee Beuerman,Gregor Reid
出处
期刊:Clinical and Vaccine Immunology [American Society for Microbiology]
卷期号:9 (1): 92-96 被引量:107
标识
DOI:10.1128/cdli.9.1.92-96.2002
摘要

ABSTRACT Lactobacillus rhamnosus GR-1 and L. fermentum RC-14 are well-characterized probiotic strains with efficacy in the prevention and treatment of urogenital infections in women. The aim of the present study was to apply a molecular biology-based methodology for the detection of these strains and L. rhamnosus GG (a commercially available intestinal probiotic) in the human vagina in order to assess probiotic persistence at this site. Ten healthy women inserted vaginally a capsule containing either a combination of strains GR-1 and RC-14 or the GG strain for 3 consecutive nights. Vaginal swabs taken before and at various time points after probiotic insertion were analyzed, and the Lactobacillus flora was assessed by randomly amplified polymorphic DNA (RAPD) analysis. This method generated discrete DNA fingerprints for GR-1, RC-14, and GG and enabled successful detection of these strains in the vagina. Strain GR-1 and/or strain RC-14 was found to persist in the vaginal tract for up to 19 days after vaginal instillation, while L. rhamnosus GG was detectable for up to 5 days postadministration. In conclusion, the fates of probiotic L. rhamnosus and L . fermentum strains were successfully monitored in the human vagina by RAPD analysis. This technique provides molecular biology-based evidence that RC-14 and GR-1, strains selected as urogenital probiotics, persist in the human vagina and may be more suited to vaginal colonization than L. rhamnosus GG. This highlights the importance of proper selection of strains for urogenital probiotic applications.
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