Fungal growth media
AssigneeJ. K. and Susie L. Wadley Research Institute and Blood Bank
InventorsGordon L. Dorn, Geoffrey A. Land
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Abstract
Fungal growth media comprising a mixture of oxgall, purified saponin, a substrate for phenol oxidase and a supporting agent, such as agar, are provided which facilitate rapid identification of a variety of pathogenic fungi obtained from a sample of body fluid, for example. Specifically, the growth media of the present invention provides for the rapid differential identification of Candida albicans and Cryptococcus neoformans.
Claims16
A fungal growth medium comprising oxgall, purified saponin which is nontoxic to microbial pathogens, and a substrate for phenol oxidase in combination with a supporting agent therefore.
In a fungal growth media comprising oxgall and caffeic acid the improvement comprising the addition of at least about 0.3 grams per liter of said media of purified saponin which is nontoxic to microbial pathogens.
A dry preparation for mixing with water to form a fungal growth media, comprising purified saponin which is nontoxic to microbial pathogens, oxgall, and a substrate for phenol oxidase.
A fungal media for the rapid identification of Cryptococcus neoformans and Candida albicans comprising from about 1 to about 5 weight percent of agar, from about 0.1 to about 1.0 weight percent of purified saponin which is nontoxic to microbial pathogens, from about 0.5 to about 5 weight percent oxgall, and from about 0.005 to about 0.05 weight percent of caffeic acid dissolved in water, said weight percent based upon the water content of the media.
In a method for the identification of Cryptococcus neoformans and Candida albicans present in a body fluid sample the improvement comprising:
- plating said body fluid sample on a fungal growth medium comprising purified saponin which is nontoxic to microbial pathogens, oxgall, and a substrate for phenol oxidase.
In a method for the identification of Cryptococcus neoformans and Candida albicans present in a body fluid sample wherein said body fluid sample is plated on a primary media for growth and the resulting fungal growth is plated on a secondary media the improvement comprising:
- plating said fungal growth on a media comprising purified saponin which is nontoxic to microbial pathogens, oxgall, and a substrate for phenol oxidase, to thereby result in the formation of germ tubes and chlamydospores on said Candida albicans and the development of dark pigment by said Cryptococcus neoformans without affecting the morphology of other yeasts in said fungal growth.
Dependencies are inferred from the claim text.