Mycology Parasitology overview Flashcards
Culture on bacterial lawn, nasal entry, CNS, protozoa
Sx- granulomatous amebic encephalitis, chronic disease in IC
Acanthamoeba
Acanthamoebiasis
Hyphae bifurcate at acute angles, inhalation of spores from soil, fungus, CNS
Sx- fungus ball in tissue, AIDS associated encephalitis
Aspergillus fumigatus
Aspergillosis
CMI deficiency, monomorphic, yeast only, unique capsule, fungi, CNS, inhalation of spores or yeast from soil below pigeon roosts
Sx- fever, HA, stiff neck and disorientation, dissemination
Cryptococcus neoformans
Cryptococcosis
Cysticerci larvae are released and invade brain and eye, ingestion of pork tapeworm eggs, cestode, CNS
Sx- calcified pockets in brain
Taenia solium
Cysticercosis
Associated with diabetes, morphology of asexual fruiting structure and mycelium, inhalation of conidia, fungi, CNS
Sx- tissue destruction in brain
Rhizopus sp, Abside sp, Mucor sp.
Mycormycosis- CNS
Zygomycosis- CNS
Free-living in water, protozoa, transmitted as a trophozoite, no cyst, inhalation of dust, CNS
Sx- encephalitis or meningoencephalitis
Naegleria fowleri
Naegleria infection
Larval worm invade many tissues, cestode, CNS, ingestion, sparganum larva in contaminated water or fish
Sx- motile worm in brain, calcified pockets
Diphyllobothrium
Sparganosis
Oocysts from cat litter boxes, protozoa, CNS, oocyst inhalation or undercooked pork ingestion
Sx- mono-lik, severe congenital or AIDS associated disease
Toxoplasma gondii
Toxoplasmosis
Africa, CNS, protozoa, Tsetse fly bite transmits a trypomastigote
Sx- headache, fatigue, coma
Trypanosoma brucei gambiense, T.b. rhodesiense
Trypanosomiasis (sleeping sickness)
Free living in water, protozoa, transmitted as a trophozoite, no cyst, nonsterile eye solutions, swimming in warm water, inhalation of dust, EYE
Sx- keratitis, encephalitis, or meningoencephalitis
Acanthamoeba
Acanthamoebiasis
calabar swellings, nematode, transcutaneous, mango fly bite containing worms, EYE
Sx- migrating worm seen in eye
Loa loa
Loiasis
associated with diabetes morphology of asexual fruiting structure and mycelium, inhalation of conidia, fungi, EYE
Sx- tissue destruction
Rhizopus sp, Absida sp, Mucor sp
Crescent-shaped macroconidia of Fusarium, conidia in soil inoculated into eye, fungi, EYE
Sx- raised corneal ulcers with occasional satellite lesions, plaques, or hypopyon
Fusarium solani
Candida albicans
Mycotic keratitis
Associated with fly habitat around rivers, transcutaneous, black fly bite containing worms, nematode, EYE
Sx- acute and chronic inflammation involving many tissues but most botably the eyes, hyperpigmented skin
Onchocerca volvulus
Onchocerciasis (river blindness)
larval worm invade many tissues, ingestion sparganum larva in contaminated water or fish, cestode, EYE
Sx- motile worm in eye calcified pockets
Diphyllobothrium latum
Sparganosis
Amoeba with ingested RBCs, cyst ingestion from fecal contaminated food, water, amoeba, GI
Sx- colitis, diarrhea with mucus and blood in severe cases, liver abscess
Entamoeba histolytica
amoebiasis, intestinal
amoebic dysentery
Most common helminthic infection worldwide, larvae travel from intestine to lung then back to intestine, adult worms are 30cm long, eggs are passed in feces, ingestion of eggs in fecal-contaminated water, nematode, GI
Sx- pneumonitis, intestinal perforation
Ascaris lumbricoides
Ascariasis
very large (50 x 100µm) protozoa, cyst ingestion, swine fecal associated, GI
Sx- colitis, bloody stools
Balantidium coli
Balantidiasis
dimorphic, budding yeast, invasive septate hyphae, pseudohyphae in tissue, germ tube formation in serum, chlamydospores on corn meal agar, normal flora become invasive via germ tube or pseudohyphae, fungi, GI
Sx- creamy or cheesy growth in mouth or esophagus, moist skin ares
Candida albicans
Candida glabrata
Candidiasis (oral thrush)
Chinese liver fluke, Eastern Asia, operculated eggs in feces, ingestion of larvae in undercooked infected fish, trematode, GI
Sx- hepatitis, biliary obstruction
Clonorchis sinensis
Clonochiasis
acid-fast cysts (uniformly stained-darkly), oocyst ingestion, protozoa, GI
Sx- AIDs associated diarrhea
Cryptosporidium parvum
Cryptosporidiasis
acid-fast cysts (variably stained), oocyst ingestion, protozoa, GI
Sx- AIDs associated diarrhea
Cyclospora cayetanesis
Cyclosporiasis
AIDs associated, oocyst ingestion, protozoa, GI
Sx- AIDs associated diarrhea
Cystoisospora belli
Cystoisosporiasis
No cyst, associated with pinworm infections, pinworm egg ingestion, protozoa, GI
Sx- moderate diarrhea
Dientamoeba fragilis
Dientamoebiasis
Eggs are passed in feces, motile, larval worm invade many tissues, ingestion of undercooked fish containing tissue cysts, cestode, GI
Sx- mild diarrhea, vit B12 deficiency
Diphyllobothrium latum, fish tapeworm
Diphyllobothriasis (fish tapeworm infectation)
Pumpkin seed tapeworm, feces contain egg packets of 8-15 eggs, ingestion of eggs in crushed fleas (from dog saliva), cestode, GI
Sx- asymptomatic to mld diarrhea
Dipylidium caninum
Dipylidium caninum infection
oncosphere larvae invade liver, lung, CNS and bone producing hydatid cysts which contain hydatid sand and fluid, Casoni skin test, ingestion fo eggs, Cestode, GI
Sx- large abdominal cysts causing organ destruction and inflammation
Echinococcus granulosus
E. multilocularis
Echinococcosis (hydatid disease)
sheep liver fluke, operculated eggs in feces, ingestion of larvae on water cress, trematode, GI
Sx- RUQ pain, fullness, jaundice, organ destruction, hepatitis and cirrhosis
Fasciola hepatica
Fascioliasis
Giant intestinal fluke, Southeast Asia, India, operculated eggs in feces, ingestion of larvae on water chestnuts, trematode, GI
Sx- diarrhea to malabsorption syndrome
Fasciolopsis buski
Fasciolopsiasis
sylvatic distrib., Sucker, face-like appearance, cyst ingestion from fecal contaminated water, protozoa, GI
Sx- duodenitis mild diarrhea to malabsorption syndrome
Giardia lamblia
Giardiasis
Hookworms (oral biting plates), eggs passed in feces, larvae go to lungs and then to the intestine, transcutaneous penetration of larvae from fecal-contaminated soil, nematode, GI
Sx- pruritis at skin penetration site, diarrhea, pneumonitis, anemia
Ancylostoma duodenale
Necator americanus
Hookworm infection
Most common human tapeworm in the USA, 3cm long, eggs are passed in feces, ingestion of eggs in food contaminated with bugs or mouse/rat feces, cestode, GI
Sx- asymptomatic to mild diarrhea
Hymenolepis nana
Hymenolepiasis
Asia, Africa, sandfly bite transmits a promastigote, protozoa, GI
Sx- fever, diarrhea, liver, spleen, kidney damage
Leishmania donovani
Leishmaniasis visceral (Kala-azar)
ingestion of conidia, fungi, GI
Sx- AIDs associated chronic diarrhea, slim or wasting disease
Microsporidia, Enterocytozoon bieneusi
Microsporidiasis