Multiple choice

Tetanus toxoid is usually given to humans

  1. together with the toxin

  2. without the addition of any other agent

  3. with complete Freund's adjuvant

  4. absorbed to aluminum hydroxide

  5. only as a therapeutic agent, not prophylactically
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bacterial exotoxins can be detoxified by formaldehyde treatment which does not destroy the major immunogenic determinants. The toxoid is generally given after adsorption to aluminum hydroxide which acts as an adjuvant and produces higher antibody titers.

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