In vitro survival of human pathogenic fungi in Hawaiian beach sand

Sabouraudia
J H Anderson

Abstract

In vitro studies utilizing 4 pathogenic fungi, Trichosporon cutaneum, Candida albicans, Microsporum gypseum and Trichophyton mentagrophytes, all known from Hawaiian beaches, indicate that they survive in the fluctuating beach habitat where they can serve as potential sources of infection for significant periods of time. Survival was measured by testing the viability of propagules at intervals for 6 months. All species survived 6 months under 1 or more experimental conditions. Survival patterns showed both increases and decreases depending upon the given parameters designed to simulate various beach conditions. Propagules inoculated on hair and horn (keratinized inoculum) did not remain viable longer than propagules from pure culture suspensions (non-keratinized). Microbial antagonism was not a major factor in survival. All species survived at least 1 month in non-sterile sand inoculated with keratinized propagules. This condition approximated the natural sand habitat. Alternate wetting and drying of sand caused an overall decrease in survival time except for M. gypseum (non-keratinized inoculum) at 37 degrees C in sterile sand and T. mentagrophytes (keratinized inoculum) at 37 degrees C in non-sterile sand. Temperature was impo...Continue Reading

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Citations

Oct 6, 2005·Applied and Environmental Microbiology·An TanghePatrick Van Dijck
Nov 11, 2014·Re/views in Environmental Science and Bio/technology·Richard WhitmanHelena M Solo-Gabriele
Jan 31, 2015·Research in Microbiology·Esther Segal, Michael Frenkel
Dec 21, 2013·The Science of the Total Environment·R SabinoJ Brandão
Jun 23, 2009·American Journal of Epidemiology·Christopher D HeaneyTimothy J Wade

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