Abstract
Summary
Phagocytic activity was comparable in germ free and “conventional” control rats as evaluated by the intravascular clearance of a gelatinized radioiodinated “RE test lipid emulsion.” Both germfree and conventional plasma manifested similar opsonic activity as evaluated by their ability to enhance Kupffer cell phagocytosis of colloidal gold in vitro. Opsonin is suspected to be a “natural antibody” in view of the phagocytic stimulatory activity of plasma from the germ-free animals.
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