Coombs' Activity

The following is a Positive Coombs' Test result. If this were a Direct test, which of the following would be true?

	Rh+ red blood cells were added to the mother's serum.
	Addition of Coombs' Reagent was the first and only step.
	After the addition and binding of anti-Rh IgG, anti-human Coombs' Reagent binds and causes the agglutination of Rh+ red blood cells.
	Coombs' Reagent binds directly to Rh antigens.

Immunological Techniques
University of Arizona
Monday, November 17, 1997
douglas.lake@asu.edu