Published in Vaccine Weekly, February 16th, 2005
According to published research from England, "The comparative intradermal skin test, in which a delayed type hypersensitivity (DTH) response to purified protein derivative of tuberculin (PPD) from Mycobacterium bovis and M. avium is assessed and compared, may be used repeatedly on non-infected animals on farms where bovine tuberculosis (TB) has occurred. A skin test is known to affect subsequent skin tests in...
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