Friday, July 24, 2009
17 - Germ Tube test
The yeast is incubated in horse serum at 37oC for 2 hours and the cells examined microscopically. Candida albicans, and the rarer oral pathogen C. dubliniensis, are the only species of the genus Candida that produce a short germ tube under these conditions as seen in the figure. C. albicans represents 80% of all clinical isolates. Other species of the genus Candida are germ tube-negative and require further tests to identify them.
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