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Toxoplasmosis
MC CNS parasite
Trophozoite, Bradyzoite (tissue cyst), sporozoite (feces)
Immunosuppressed
can be congenital
Plasmodium Falciparum
Malaria
residual neuro damage
RBC rosettes
Naegleria Fowleri
Primary amebic meningoencephalitis
thermophilic fresh water
sx identical to bacterial meningitis
phagocytic (RBC and brain)
food cup w/ enzymes
hemorrhagic CSF (increased RBC)
wet mount w/ motile trophozoites
Acanthomoeba
Granulomatous amebic encephalitis
immunosuppressed
defend via humoral, complement and IgM/IgG
assoc w/ trauma (not swimming to diff from N Folweri)
Trypanosomiasis
T brucei gambiense = west, human, slow
T brucei rhodesiense = east, zoonotic, rapid
kinetoplastids
acute blood stage → lymph invasion → relapse stage (antigenic variation)
cross BBB => meningoencephalitis
Taenia Solium
neurocysticercosis => seizure and alt mental status
avoids immune sys (degrade Ab and inhibit phagocytosis)
Echinococcus granulosus
dogs
hydatid cysts (scolices from daughter cells)- Praziquantel
Angiostrongylus Cantonensis
snail/slug, rat
can see worm in vitreous humor
high IgM and IgE in serum, Ab in serum, brain lesion, larvae/worm in CSF
Cryptococcus neoformans
India ink
yeast-like
pigeon poo
capsule, 37 C, phenol oxidase
cryptococcal meningitis
immunosuppressed
Coccidioids Immitis
San Joaquin Valley Fever
coccidioidomycosis = true systemic mycosis
inhale
most virulent human mycotic agent
dimorphic
mold spore (arthroconidia)
spread to CNS => chronic granulomatous meningitis