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. 1978 Feb;35(2):237-42.
doi: 10.1128/aem.35.2.237-242.1978.

Membrane filter procedure for enumeration of Candida albicans in natural waters

J D Buck, P M Bubucis

Membrane filter procedure for enumeration of Candida albicans in natural waters

J D Buck et al. Appl Environ Microbiol. 1978 Feb.

Abstract

A membrane filter procedure is described for the enumeration of Candida albicans in natural waters. Several hundred milliliters of sample can be examined by filtration through 1.2-micrometer membranes. Selectivity is achieved by the use of a defined (yeast-nitrogen base plus maltos-) agar medium inclusion of the antimicrobial agents chloramphenicol and cycloheximide, and incubation at 37 degrees C. C. albicans colonies are differentiated primarily through color by use of a bismuth salt indicator system. Average recovery of various strains of C. albicans stressed in seawater at 4 degrees C was 82%, compared with those of spread plate controls on a noninhibitory medium. With river water and raw sewage, 90% of typical C. albicans colonies were confirmed as such in a simplified germ tube test. Atypical colonies verified as C. albicans were infrequent (3%). C. tropicalis and Torulopsis candida were the most common false-positive colonies.

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References

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