The Rh testing on a blood donor was negative at immediate spin. The tube was incubated at 37°C for 15 minutes. The tube was centrifuged and read macroscopically. The test was negative at 37°C. The tube was washed three times with saline, and two drops of AHG were added. After centrifugation, the tube yielded a 2+ reaction. How is this Rh type reported on the donor unit?

Question

Quizplus · Accepted Answer

The 2+ reaction after the addition of AHG indicates the presence of weak D antigen, which is reported as Rh-positive.

The Rh Testing on a Blood Donor Was Negative at Immediate