Situation 18.1 In an Immunodiffusion Test to Diagnose Histoplasmosis, Patient's Serum Is

Multiple Choice

Situation 18.1
In an immunodiffusion test to diagnose histoplasmosis, patient's serum is placed in a well in an agar plate. In apositive test, a precipitate forms as the serum diffuses from the well and meets material diffusing from a second well
-The immunodiffusion test described in Situation 18.1 is

A) An ELISA test.
B) A direct test.
C) A complement- fixation test.
D) A precipitation reaction.
E) An agglutination reaction.