Abstract
Defective chemotaxis and phagocytosis of Staphylococcus aureus was identified in a female infant with marked hepatosplenomegaly and recurrent infections. Neutrophil mobilization from the marrow and marginal pool; random mobility; phagocytosis of yeast particles, latex beads and carbon particles; phagocytosis and intracellular killing capacity of Streptococcus pyogenes and E. coli; and NBT dye reduction were normal. Infiltration of neutrophils was depressed in the skin window test. The complement system and cellular immunity were intact. The patient also had a persistent EB virus infection. Defective phagocytosis limited to Staphylococcus aureus seems to be caused by an intrinsic cellular defect, such as congenital defect in neutrophil receptors for Staphylococcus aureus.
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