1. Living phagocytes are able to protect ingested organisms from the action of destructive substances in the surrounding fluid, and even from a strong homologous antiserum.
2. There is evidence that the protection by phagocytes is largely if not entirely conditioned on their being alive.
3. These facts should be taken into consideration in the study of diseases caused by infectious agents capable of living within tissue cells.
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Copyright, 1916, by The Rockefeller Institute for Medical Research New York
1916
