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.
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