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NBME 22 Answers

nbme22/Block 2/Question#23

A 32-year-old woman comes to the physician because ...

Reduviid bug

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Arthropod infections

a. Trypansoma cruzi = reduviid bug

b. Trypanosoma brucei = Tsetse fly

c. Malaria = Anopheles mosquito

d. Flavivirus Group (West Nile Virus, Dengue) = Aedes mosquito

e. Microfilariae = black fly

f. Leishmania braziliensis = sand fly

g. Borrelia & Babesia =Ixodes tick

h. Rickebsia rickebsii & Francisella tularensis = Dermacentor tick

i. Rikebsia prowazekii = lice

j. Loa loa (African eye worm) = deer fly

k. Wuchereria bancrofti = mosquitoes

zoek816  West Nile Virus = Culex +  




FA 2019 p156 Does anyone know how to differentiate the picture labeled Trypanosoma brucei and cruzi?

footballa  This question is likely not important for two reason: They're both Trypansomastigotes, so of course they look almost the same. You can differentiate these two species clinically as they have very little clinical similarity in patient presentation. For these reasons there's little to no reason you would be expected to differentiate these two species by histology alone +1  




Chagas disease, trypomastigote on blood smear; cardiomyopathy, predominantly found in South America





16. Arthropod infections a. Trypansoma cruzi = reduviid bug b. Trypanosoma brucei = Tsetse fly c. Malaria = Anopheles mosquito d. Flavivirus Group (West Nile Virus, Dengue) = Aedes mosquito e. Microfilariae = black fly f. Leishmania braziliensis = sand fly g. Borrelia & Babesia =Ixodes tick h. Rickebsia rickebsii & Francisella tularensis = Dermacentor tick i. Rikebsia prowazekii = lice j. Loa loa (African eye worm) = deer fly k. Wuchereria bancrofti = mosquitoes




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