Question

At 4 C you test a patient's plasma against the following types of cells and get the following results. What antibody do you believe you have?

1) Anti-I
2) Anti-P
3) Anti-M
4) Anti-IH

Answer 1

Agglutination with both anti-A and anti-B antibodies indicates AB blood type in a patient. So the answer is: 2) Anti-P.

Step-by-step explanation:

The provided information hints at a lab procedure to determine a patient's blood type. When a blood sample visibly agglutinates with anti-A and anti-B antibodies, it suggests the presence of both A and B antigens on the red blood cells (RBCs), indicating a blood type of AB. If there is no error in the procedure and both samples agglutinated normally, it indicates that the patient has AB blood type, which aligns with the expected outcome when using these particular antiserums.

In regards to determining if a patient's plasma contains Anti-I, Anti-P, Anti-M, or Anti-IH antibodies, these could be considered naturally occurring antibodies, sometimes present in the plasma depending on the individual's blood type and previous exposures. The test outcomes at 4 degrees Celsius would help determine the presence of cold agglutinins, but additional context from the student's question, such as the specific reactions with each antibody, is needed to provide a precise answer. So the answer is option 2) Anti-P.