Sunday, October 11, 2009

Protozoa MCQ

1.) Protozoa can be divided into five groups: a.) amoebae, intestinal flagellates, blood and tissue flagellates, multicellular flagellates, ciliates b.) amoebae, intestinal flagellates, blood and tissue flagellates, sporozoa, ciliates c.) multicellular flagellates, unicellular flagellates, ciliates, sporozoa d.) coccidians, piroplasms, cytoplasms, haemosporidians

2.) Trypanosomes reproduce by: a.) gametocyte fusion b.) blebbing c.) schizogony d.) binary fission

3.) E. histolytica and E. coli can be distinguished: a.) morphologically b.) by antibody detection c.) geimsa staining d.) cannot be distinguished

4.) Giardiasis is spread through: a.) water supplies b.) food prep c.) sexual contact d. all of the above

5.) Protozoan cysts: a.) actively feed b.) are generally larger than trophozoites c.) are the primary cause of pathogenesis d.) can be infective after several weeks in the environment

6.) Excystment is triggered by: a.) pH changes b.) increased moisture c.) recognition of antigens d.) pepsinogen

7.) The "string test" is administered: a.) orally b.) endoscopically c.) in latrines d.) rectally

8.) Drugs such as metronidazole contain a nitro group that: a.) functions best in the presence of oxygen b.) forms a nitroradical in anoxic cells c.) does not act on anaerobic infective agents d.) has been banned by the WHO

9.) Solar water disinfectants: a.) do not reduce diarrhea b.) cost more than ozone treatment c.) are cost effective in developing countries d.) have 100% efficacy

10.) Maurer's clefts are formed by: a.) extensions of the parasitophorous vacuole b.) fusion of Schuffner's dots c.) Accole tensions d.) splenomegaly

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