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Microbiology
IgA antibody is the first line of defense against infections at the mucous membrane. It is usually an early specific antibody. Which of the following statements regarding IgA is not true?
Complement fixation tests for IgA antibody will be positive if specific IgA antibody is present
IgA is not found in saliva, therefore an IgA diagnostic test on saliva would have no value
IgA can be destroyed by bacterial proteases
IgA is absent in colostrum
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