General evidence supporting the hypothesis that Saccharomyces cerevisiae vaginal isolates originate from food industrial environments

Saccharomyces cerevisiae strains isolated from pregnant women were identified and characterized by molecular techniques which disclosed a wide chromosomal variability and possible segregations due to sporulation. The morphological analysis showed that very few strains were able to sporulate and gene...

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Bibliographic Details
Published in:The New microbiologica 2006-07, Vol.29 (3), p.201
Main Authors: Siccardi, Daniela, Rellini, Paolo, Corte, Laura, Bistoni, Francesco, Fatichenti, Fabrizio, Cardinali, Gianluigi
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Ethanol - metabolism
Female
Fermentation
Food Industry
Food Microbiology
Genetic Variation
Genotype
Humans
Pregnancy
Saccharomyces cerevisiae - classification
Saccharomyces cerevisiae - genetics
Saccharomyces cerevisiae - isolation & purification
Vagina - microbiology
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Summary:Saccharomyces cerevisiae strains isolated from pregnant women were identified and characterized by molecular techniques which disclosed a wide chromosomal variability and possible segregations due to sporulation. The morphological analysis showed that very few strains were able to sporulate and generate pseudohyphae, whereas none produced proteases, raising some doubts on the importance of these characters in strain pathogenicity. The analysis of ethanol production revealed that these strains are quite similar to those found in fermentative plants, suggesting a possible derivation from the food industrial environment. Since the absence of relevant amounts of sugar does not confer selective advantage to strong fermentative metabolisms, these findings suggest that a metabolic adaptation to the vaginal environment did not occur yet.
ISSN:1121-7138