MYCO - Dematiaceious (Melanized) Molds Flashcards
The _______ fungi are characterized by dark coloration
as a result of their ability to produce melanin and are known
agents of superficial and subcutaneous mycoses that involve
the skin and subcutaneous tissues
dematiaceous
In the mycology laboratory, dematiaceious fungal species are often initially separated by growth rate into the slow-growing dematiaceous molds, which may require ______ days to grow,
7 to 10
rapid-growing dematiaceous molds grow for about how many days
less than 7 days
Tinea nigra is a superficial skin infection caused by ____, a halophilic species
Hortaea werneckii
It is manifested by blackish
brown, macular patches on the palm of the hand or the sole of
the foot
Tinea nigra
Lesions of tinea nigra have been compared with _______ staining
of the skin.
silver nitrate
is a fungal infection of the hair, scalp,
and occasionally the axillary and pubic hair
Black piedra
Black piedra is caused by
dematiaceous fungus - Piedraia hortae.
a common plant pathogen, causes infections of the skin and nails
that may lead to hyperkeratosis
Neoscytalidium dimidiatum
A _______is a chronic granulomatous infection that usually involves the lower extremities but may occur in any part of the body.
mycetoma
The infection is characterized by swelling,
purplish discoloration, tumorlike deformities of the subcutaneous
tissue, and multiple sinus tracts that drain purulent
material containing yellow, white, red, or black granules.
mycetoma
Bacterial mycetoma
Nocardia, Actinomadura, and Streptomyces spp.
White grain mycetoma
P. boydii and Acremonium and
Fusarium spp.
Black grain mycetoma
Madurella spp., Exophiala
jeanselmei, and Curvularia spp.
is a general term used to describe any
infection caused by a dematiaceous organism;
Phaeohyphomycosis
is a chronic fungal infection acquired
through traumatic inoculation of an organism,
primarily into the skin and subcutaneous tissue
Chromoblastomycosis
