The Journal of Experimental Medicine, Vol 100, 417-424,
Copyright, 1954, by The Rockefeller Institute for Medical Research New York
THE MECHANISMS BY WHICH MACROPHAGES PHAGOCYTE ENCAPSULATED BACTERIA IN THE ABSENCE OF ANTIBODY
William D. Sawyer M.D.1,
Mary Ruth Smith 1, and
W. Barry Wood Jr. M.D.1
1 From the Department of Medicine and the Oscar Johnson Institute for Medical Research, Washington University School of Medicine, St. Louis
Evidence has been presented: (1) that macrophages from experimentally produced inflammatory exudates are capable of phagocyting fully encapsulated Type I pneumococci and group A Friedländer's bacilli in the absence of antibody, (2) that the principal mechanisms involved are those of surface phagocytosis, and (3) that the majority of pneumococci ingested by macrophages in antibody-free preparations are ultimately destroyed.
The relationship of these phenomena to the mechanism of recovery in pneumococcal and Friedländer's bacillus infections has been briefly discussed.
Submitted on July 14, 1954