Jump to Content

Related Links

Phagocytes (Macrophages)1,2

Phagocytes are cells that kill the pathogen by surrounding and digesting it. Recognition of pathogens is made easier for phagocytes when the pathogen is coated with antibodies or complement.

Macrophages are one type of phagocyte. Beginning as monocytes, they become macrophages when they leave the bloodstream and enter tissues. In addition to engulfing and killing invading microorganisms, macrophages help lymphocytes by displaying foreign antigens.

  1. Blaese RM, Winkelstein J. Patient & Family Handbook for Primary Immunodeficiency Diseases. Towson, MD: Immune Deficiency Foundation; 2007, p.6.
  2. U.S. Department of Health and Human Services. National Institutes of Health. Understanding the Immune System: How It Works. NIH Pub No. 03-5423; p. 15.