Microbiology: Parasites & Fungi Flashcards
what is another term for onchocerciasis
river blindness
how does onchocerciasis cause infection
transmitted through a biting black fly → nematode infects bloodstream & migrates towards various organs → causes corneal scarring & blindness
what type of parasite is toxoplasma gondii
obligate intracellular parasite → cell destruction, reproduction, cyst formation
hosts for toxoplasma gondii & how is it spread
definitive host → cats
accidental host → humans
cyst inhaled from cat feces or ingesting improperly cooked meat from animals that were previously infected with it
what parasite is found in soil & fresh water
acanthamoeba
what are the two forms of acanthamoeba & what does it result in
trophozite: metabolically active
cyst: dormant, stress-resistant
results in severe infection of cornea, skin, & CNS
are fungi gram-positive or gram-negative
gram-positive
what are some examples of fungi
yeasts, mold
what are some factors that predispose fungal diseases in the eye
local trauma, CL wear, topical steroids, immunocompromised state, contamination in catheters or IV lines
name some fungal eye diseases
conjunctivitis, keratitis, sinusitis, choroiditis, endophthalmitis
candida, fusarium, aspergillus & histoplasma are all types of what
fungi
