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Tropozoa
| Question | Answer |
|---|---|
| Brain abscess in HIV (seen as ring-enhancing brain lesions on CT/MRI) | Toxoplasma gondii |
| bloating, flatulence, foul-smelling, fatty diarrhea (often seen in campers/hikers) | Giardia lamblia |
| Trophozoites or cysts in stool | Giardia lamblia |
| Bloody diarrhea (dysentery), liver abscess, RUQ pain | Entamoeba histolytica |
| Trophozoites (with RBCs in the cytoplasm) or cysts (with multiple nuclei) in stool | Entamoeba histolytica |
| Oocysts on acid fast stain | Cryptosporidium |
| Liver abscess | Entamoeba histolytica |
| Severe diarrhea in AIDS | Cryptosporidium |
| Oocysts in cat feces, crosses placenta | Toxoplasma gondii |
| Classic Triad: Chorioretinitis, hydrocephalus and intracraneal calcifications | Toxoplasma gondii |
| Tachyzoite on biopsy | Toxoplasma gondii |
| Rapidly fatal meningoencephalitis | Naegleria fowleri |
| Swimming in freshwater lakes ; enters via cribriform plate | Naegleria fowleri |
| Amoebas in spinal fluid | Naegleria fowleri |
| Tsetse fly, a painful bite | Trypanosoma brucei |
| Trypanosoma brucei treatment | Suramin: blood borne disease Melarsoprol: CNS penetration |
| African sleeping sickness: enlarged lymph nodes, recurring fever, somnolence, coma | Trypanosoma brucei |
| Trophozoite ring form within RBC, schizont containing merozoites | Plasmodium |
| Severe; irregular fever patterns; parasitized RBCs occlude capillaries in brain (cerebral malaria), kidneys, lungs | P. falciparum |
| When treating with Quinidine or Primaquine test for | G6PD deficiency |
| "Maltese cross" | Babesia |
| Ixodes Tick | Babesia, Borrelia burgdorferi |
| Chagas' disease: dilated cardiomyopathy, megacolon, megaesophagus; predominantly in South America | Trypanosoma cruzi |
| Reduviid bug ("kissing bug") | Trypanosoma cruzi |
| Trypanosoma cruzi treatment | Benznidazole or nifurtimox |
| Macrophages containing amastigotes | Leishmania donovani |
| Sandfly | Leishmania donovani |
| Leishmania donovani treatment | Sodium stibogluconate |
| Vaginitis: foul-smelling, greenish discharge; itching and burning; | Trichomonas vaginalis |
| Trophozoites (motile) on wet mount | Trichomonas vaginalis |
| Strawberry cervix | Trichomonas vaginalis |
| Trichomonas vaginalis | Metronidazole for patient and partner (prophylaxis) |