Fungi intro Flashcards
what type of cells are fungi?
eukaryotic
how do fungi reproduce?
sexually
asexualy via spores
what are heterotrophs?
do not ingest food but parasitize off of living matter
what are the oxygen growth requirements for most fungi?
obligate aerobes
what are the oxygen growth requirements for yeast?
facultative anaerobes
what is the site of action of most anti-fungal agents?
sterols of cell membrane
what differentiates molds?
hyphae
what differentiates yeast?
budding
mucoid colonies
which form of fungi produces pseudohyphae?
yeast (esp. Candida)
what does the germ tube test identify?
C. albicans
what mycotic agents are thermally dimorphic?
Histoplasma
Blastomyces
Coccidioides
Sporothrix
what type of spores are not encapsulated?
Conidia
what size of Conidia is infectious in the RT?
Microconidia
what type of spores are thick walled, produced by fragmentation of hyphal cells, and can cause RT infx by inhalation?
Arthroconidia
what type of spores are contained within sac-like structures?
Sporangiospores
what fungi produce microconidia?
Histoplasma
Blastomyces
Aspergillus
Mucormycoses
what fungi produce sproangiospores?
Coccidioides
PCP
if a patient presents with systemic mycosis like symptoms, and a biopsy shows the presence of spherules, what agent is responsible?
coccidioidomycoses
if a patient presents with systemic mycosis like symptoms, and a CXR shows cysts of 4-6 micrometers in diameter containing intracellular comma-shaped bodies, what agent is responsible?
Pneumocystis jiroveci (PCP)
what are buds that arise from yeast cells?
blastopores
what are infections that are confined to the outermost layers of the skin (statum corneum)?
superficial mycoses
what agents cause superficial mycoses?
Malassezia furfur
Piedra hortai
Trichosporon beigelii
Exophiala werneckii
what are infections that primarily involve the epidermis, hair, and nails (keratin containing tissue)?
cutaneous mycoses
what agents cause cutatneous mycoses?
Epidermophyton
Microsporum
Trichophyton
