Mycology Flashcards
Mode of transmission of dimorphic fungus that lives on vegetation occurring most often in gardeners
Thorn pick (Sporothrix schenckii)
An oval yeast with narrow based bud surrounded by a wide polysacccharide capsule in india ink also tests positive for:
Cryptococcal antigen Latex agglutination system, CALAS (C. neoformans)
Pneumonia caused by an indeterminate organism which induces an inflammatory response in the alveoli (ARDS) manifests when CD4 is less than
200 (P. jiroveci)
Sporothrix schenckii: rose thorns; Histoplasma capsulatum:
Bird droppings or Bat guano
The most common cause of fungal pneumonia has this characteristic bud:
Broad based (Blastomycosis dermatitidis)
Thick yeast with multiple buds in wheel configuration more commonly affects what sex?
Males. Growth is inhibited by estrogen (Paracoccidioides brasiliensis)
Fungus whose septate hyphae forms acute angles exists only as
Molds (Aspergillus fumigatus)
Acute angles: Aspergillus; Right angles:
Rhizopus oryzae and Mucor spp.
Asexual reproductive structures produced either from transformation of a vegetative yeast or hyphal cell or specialized conidiogenous cell
Conidia
Large thick walled conidia produced from terminal or intercalary hyphal cells
Chlamydoconidia/Chlamydospores (Candida albicans)
Conidia that result from the fragmentation of hyphal cells
Arthoconidia/arthospore (Coccidioides immitis)
Discrete, serpentine, hyper or hypopigmented macular patches that may enlarge or coalesce is diagnosed by
Direct microscopy with KOH (Pityriasis versicolor)
A manifestation of tinea capitis caused by Trichophyton schoenleinii which leads to formation of scutula around follicle
Favus
In biopsy of Sporotrichosis infections, stain with Gomori methenamine silver produces color
Black
In culture of Histoplasmosis at 25C, it appears as
Hyphae with macroconidia
In culture of Histoplasmosis at 37C, it appears as
Yeast
Self limited influenza like illness caused by inhaled arthroconidia
Valley fever (Coccidiomycosis)
In contrast to Histoplastoma, Blastomycoces is located more at the _________ of an infected lesion
Periphery.
KOH preparation of direct scraping shows spherical cells 10-40microns in diameter with thick birefringent cell wall surrounded by several peripheral buds joined by narrow neck
Paracoccidioides (mariner’s wheel)
Pathognomonic of invasive candidiasis
Pseudohyphae, true hyphae and budding yeast
Beginnings of true hyphae in Candia species which express more surface receptors for attachment and binding opsonins
Germ tube
Allergic form of disease transmitted by a conidia
ABPA (allergic brochopulmonary aspergillosis)
A hypersensitivity reaction characterized by inflammatory reaction other than the site of fungal infection caused by fungi with green fluorescence on wood’s lamp is called
Dermatophytid reactions (Microsporum, Trichophyton, Epidermophyton)
Chronic subcutaneous infection induced by traumatic inoculation of saprophytic fungi
Madura foot (mycetoma)
