In this case, which red blood cells (RBCs) are agglutinating in the DAT and why?Antibody screen Cells Gel IAT*Screen Cell I 3+Screen Cell II 2+Screen Cell III 2+Patient CellsDATCCPost-transfusion2+ mixed field agglutination (MFA)N/A

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In this case, which red blood cells (RBCs) are agglutinating in the DAT and why?

Antibody screen

Cells	Gel IAT*
Screen Cell I	3+
Screen Cell II	2+
Screen Cell III	2+

Patient Cells	DAT	CC
Post-transfusion	2+ mixed field agglutination (MFA)	N/A

Please select the single best answer

	The transfused donor RBCs are agglutinating because they are positive for the corresponding antigen to the patient's antibody.
	The transfused donor RBCs are agglutinating because they are sensitized with anti-IgG but not anti-C3.
	The patient's RBCs are agglutinating because they are positive for the corresponding antigen to the donor's antibody.