Vaccines are not effective against trypanosomiasis because
A) the organisms are never exposed to the immune system.
B) the organism is only weakly antigenic.
C) the organism can change its protein coat and thereby evade the immune response.
D) all of the choices
Correct Answer:
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Q1: Most individuals with histoplasmosis exhibit a hypersensitive
Q2: In the malarial life cycle,the male gamete
Q3: Dried pigeon droppings are a potential source
Q4: Some superficial mycoses are called _.
A)sporotrichosis
B)tineas
C)dermatophytoses
D)mycetomas
Q6: Leishmania donovani causes
A)mucocutaneous leishmaniasis.
B)visceral leishmaniasis.
C)cutaneous leishmaniasis.
D)all of
Q10: African sleeping sickness is caused by
A)Giardia lamblia.
B)Trypanosoma
Q13: Which of the following is known to
Q15: Blastomyces dermatitidis causes _.
A)valley fever
B)blastomycosis
C)San Joaquin fever
D)cryptococcosis
Q18: Once inside an erythrocyte,the Plasmodium begins to
Q20: Birds carry Histoplasma capsulatum.
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