A Case of Neonatal Neutropenia Due to Anti-Fc Gamma Receptor IIIb Isoantibodies Treated with Recombinant Human Granulocyte Colony Stimulating Factor

Table 1

Results of serologic testing.

	GIFT IT	GIFT DT	GAT IT	MAIGA CD16 Fc gamma RIIIb	MAIGA CD177	MAIGA CD11 a/11 b	MAIGA Beta-2microglobulin
Maternal
Serum	pos		pos	pos, anti-HNA-1 pan-reactive	neg	neg	pos, anti-HLA-class I
Granulocytes		neg
Newborn
Serum	pos		pos	pos, anti-HNA-1 pan-reactive	neg	neg	pos, anti-HLA-class I
Granulocytes		pos

GIFT = granulocyte immunofluorescence test, GAT = granulocyte agglutination test, MAIGA = monoclonal antibody immobilization of granulocyte antigens, IT = indirect test, DT = direct test, Fc gamma RIIIb = Receptor Fc gamma IIIb, pos = positive, neg = negative, HNA = human neutrophil antigen, and HLA = human leukocyte antigen.