Vaccines Are Not Effective Against Trypanosomiasis Because

question 22

Multiple Choice

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

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Definitions:

Chymotrypsin

A digestive enzyme that breaks down proteins in the small intestine into smaller peptides.

Appendix

A supplementary material at the end of a book, document, or presentation that provides additional details or explanations.

Pharyngeal Tonsils

Two masses of lymphatic tissue located above the palatine tonsils; also called adenoids.

Nasopharynx

The portion of the pharynx behind the nasal cavity.