Comparison of Different Media for the Pigment Production of Cryptococcus neoformans
نویسنده
چکیده
InTRoduCTIon Cryptococcosis is an acute, subacute or chronic fungal disease which is caused by encapsulated basidiomycetous yeasts which belong to the genus, Cryptococcus [1]. This yeast is a particularly fascinating fungal pathogen, because it crosses the entire spectrum of the host immunity. For instance, it produces infections in apparently immunocompetent patients without any known underlying disease, but on the other hand, commonly the yeast invades a severely immunosuppressed host as a result of HIV infection, organ transplantation or malignancy or due to treatment with high doses of corticosteroids [2].
منابع مشابه
[Evaluation of melanin production by Cryptococcus species in four different culture media].
The capacity of Cryptococcus spp to produce melanin in media containing phenol compounds is widely used for identifying these species in the laboratory. The aim of the present study was to compare the production of this pigment by Cryptococcus spp. in four culture media. Sixteen strains of Cryptococcus neoformans, 17 of Cryptococcus albidus, 13 of Cryptococcus laurentii and two of Cryptococcus ...
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In recent years strains previously grouped within Cryptococcus neoformans have been divided into two species C. neoformans and C. gattii, with Cryptococcus neoformans comprising serotypes A, D, and AD and C. gattii comprising serotypes B and C. Cryptococcus neoformans have also been subdivided into two varieties C. neoformans var. grubii, serotype A, and C. neoformans var. neoformans, serotype ...
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Given the increasing prevalence of cryptococcosis caused by Cryptococcus gattii (serotypes B and C) strains, there is a need for rapid and reliable tests that discriminate C. gattii from Cryptococcus neoformans (serotypes A, D, and AD). Seventy-two C. neoformans strains, sixty-seven C. gattii strains, and five Candida albicans strains were analyzed for their ability to grow and produce pigment ...
متن کاملCryptococcus neoformans melanin and virulence: mechanism of action.
Black melanin-like pigments are produced by several neurotropic fungi, including Cryptococcus neoformans. Pigment production is associated with virulence. In media containing phenolic substrates such as L-dopa, C. neoformans cells become black as a result of pigment accumulation. Pigmented and nonpigmented C. neoformans cells were studied with transmission electron microscopy and electron spin ...
متن کاملDETECTION OF CRYPTOCOCCUS NEOFORMANS BY SEMINESTED PCR IN CEREBROSPINAL FLUID
ABSTRACT Life-threatening infections caused by the encapsulated fungal pathogen Cryptococcus neoformans have been increasing steadily over the past 10 years. Cryptococcus neoformans is recognized as the most frequent fungal infection of the central nervous system (CNS) in immunocompetent as well as immunocompromised patients. We report the development of a semi-nested- PCR-based assay for the ...
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تاریخ انتشار 2011