Practice Quiz

Veterinary Technician

Category - Pharmacology

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When considering preventative vaccination of a puppy, why are vaccines generally not given until after six weeks of age?
  1. Due to weakened immune system, allergic reaction is likely
  2. Immunoglobulins found in colostral antibodies block the vaccine
  3. Vaccines are not labeled for use in puppies less than six weeks old
  4. The preservatives found in vaccines may cause growth abnormalities if given early
Explanation
Answer: B - The Immunoglobulins found in colostral antibodies block the vaccine from reaching target cells. For this reason, vaccines are generally not given until after six weeks of age. Because of the uncertainty of the immune system response (and colostral antibodies decrease), vaccines are administered in regular intervals, up to 14 or 16 weeks of age.
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