India ink test

India ink test

a test used to detect Cryptococcus in wet preparations of patient specimens. The capsule of the yeast resists colorization by the India ink, resulting in clear organisms against dark background. The appearance of encapsulated yeast cells in cerebrospinal fluid is diagnostic for cryptococcal meningitis.

India ink test

A diagnostic test used to detect the cryptococcal organism C. neoformans. A dye, called India ink, is added to a sample of CSF fluid, and if the fungi is present, they will become visible as the dye binds to the capsule surrounding the fungus.
Mentioned in: Cryptococcosis
Mentioned in ?
References in periodicals archive ?
The India ink test is simple to perform, rapid, and, when positive, is diagnostic for cryptococcal meningitis.
Because more reliable results are obtained with the cryptococcal antigen test, it should replace the India ink examination or be performed in addition to the India ink test.

Full browser ?