Abstract
Chorpenning, Frank W. (The Ohio State University, Columbus), and Matthew C. Dodd. Heterogenetic antigens of gram-positive bacteria. J. Bacteriol. 91:1440–1445. 1966.—Soluble antigens obtained by various methods from gram-positive bacteria were used to modify erythrocytes whose hemagglutinating reactions with immune rabbit sera and normal human sera were then studied. Antigens from all gram-positive organisms studied except corynbacteria altered red cells, causing them to react with specific bacterial antisera and with normal human sera; however, cross-absorption and inhibition tests indicated that at least three different specificites were involved. One of these antigens seemed to be similar to Rantz's streptococcal NSS, which is shared with Staphylococcus aureus and Bacillus spp., and is therefore heterogenetic. Another was found in streptococci but was apparently not present in S. aureus and Bacillus spp. A third antigen, also heterogenetic, appeared to be shared by several species of Bacillus and by S. aureus, but not by streptococci or any gram-negative bacteria. The third antigen was heat-stable at pH 8.0, and appeared to be essentially polysaccharide in nature. Normal human sera varied in their content of antibodies which reacted with erythrocytes modified by extracts from gram-positive bacteria. Whereas some sera reacted very broadly with red cells modified by extracts of practically any gram-positive organism, other sera agglutinated only cells which had been modified by streptococcal antigen.
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Selected References
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