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Microbiology and Immun (Sci)
MIMM 413

1 Which of the following statements defines the best Trichinella spiralis a T spiralis is the smallest nematode b T spiralis is not host specific c Adult worms live in the small intestine for a relatively short period d They migrate in the colon e They encyst in smooth muscles2 In trichinellosis the levels of some immunoglobulin classes are elevated Which ones is or are elevated a Serum IgG and IgM b Serum IgA c Serum IgD d Serum IgE e Serum IgG2a3 Cryptosporidium parvum cell is going through several stages of development in the small intestine of its host Which ones of the following statements is or are correct a The merozoites attach to the brush border of the intestinal cells b The schizogony stage precedes the development of the merozoites c The microgametes and macrogametes are not generated d The sporozoites attach to the mucus present in the small intestine e At least 4 merozoites are released at the rupture of the oocyst4 Lymphatic filiaris includes the following species a Wuchereria bancrofti b Onchocerca volvulus c Mansonella species d Brugia malayi e Loa loa5 In human W bancrofti infection blocking antibodies have the following properties a They are of the IgG4 isotype b They are found at higher levels in patients who are infected but asymptomatic c They block parasite invasion into the lymph gland d They are found at higher levels in patients who are symptomatic with chronic disease e They always have the same specificity as IgM antibodies6 Progression of clinical pathology in human lymphatic filariasis involves a An asymptomatic incubation phase b An obstructive phase involving blockage of the lymphatic ducts c An inflammatory phase involving release of microfilaria in the lymph ducts d Inflammation of the liver and eye e A 24 fever cycle similar to what is seen in malaria infections7 Human infection with Ascaris is associated with a An increased response by PBMCs to Ascaris antigens b An increased frequency of PBMCs producing IL4 and IL5 c An increased ratio of IL4 to IFN produced by PBMCs in response to Ascaris antigen d An overall induction of a Th01 like environment e A decreased ratio of Th2 to Th1 PBMCs
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