Multiple choice

Which of the following is a distinguished feature of a Salmonella-based vaccine manifesting antigens from other infectious agents?

  1. Immunity is limited to the gut.

  2. Only secretory IgA is elicited.

  3. It does not invade the mucosal lining of the gut.

  4. It provokes both oral and systemic immunity.

  5. The organism does not need to be attenuated.

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Salmonella infects cells of the mononuclear phagocyte system throughout the body and thereby, stimulates the production of cell-mediated immunity in addition to both secretory and systemic antibody production.