Lactobacillus Research Today is a free monthly online journal that collates and summarizes the latest research about Lactobacillus, including details on probiotics, digestion, diet, health, lactobacillus acidophilus.

Scarce evidence of yogurt lactic acid bacteria in human feces after daily yogurt consumption by healthy volunteers.

del Campo R, Bravo D, Cantón R, Ruiz-Garbajosa P, García-Albiach R, Montesi-Libois A, Yuste FJ, Abraira V, Baquero F

Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Ctra. Colmenar, Km 9.1, Madrid 28.034, Spain. rosacampo@yahoo.com

In a double-blind prospective study including 114 healthy young volunteers, the presence in human feces of the yogurt organisms Lactobacillus delbrueckii and Streptococcus thermophilus after repeated yogurt consumption (15 days) was analyzed by culture, specific PCR, and DNA hybridization of total fecal DNA. Detection of yogurt lactic acid bacteria in total fecal DNA by bacterial culture and PCR assay was consistently negative. DNA compatible with yogurt bacteria was found by hybridization experiments in only 10 (10.52%) of 96 individuals after consumption of fresh yogurt and in 2 (2.10%) of 96 individuals after consumption of pasteurized yogurt (P = 0.01).

Published 10 January 2005 in Appl Environ Microbiol, 71(1): 547-9.
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