Horse Anti-Pneumococcal Immunoglobulins. II. Specific Mouse Protective Activity

Abstract
Summary The mouse protecting activity of isolated and purified γM; γA, and γG pneumococcal polysaccharide, type I antibodies was compared. The specific protective activity of γM anti-S1 was found to be approximately 1000 times as much as γA, and 100,000 times that of γG. The γM activity appears to account for the protective action of whole anti-pneumococcal serum.