Serological reactions of glycolipids from streptococcal L-forms.
Parent bacteria and L-forms of some streptococci of group A, group D, and Streptococcus MG share common antigens as shown by cross-reactivity in growth inhibition, complement fixation, and Ouchterlony tests. Cross-reactivity between these streptococci or their L-forms with a staphylococcal L-form, or Mycoplasma pneumoniae, was found only rarely and only in low-titer complement fixation tests. Removal of all three serological reactivities from positive antisera by addition of chloroform-methanol (7:3) extracts of the streptococci or their L-forms, and failure to remove activities by protein extracts, indicated the glycolipid nature of the cross-reacting antigenic determinants.
D000042:Absorption; D000818:Animals; D000942:Antigens, Bacterial; D001426:Bacterial Proteins / Q000302:isolation & purification; D001431:Bacteriological Techniques; D002473:Cell Wall; D002855:Chromatography, Thin Layer; D003168:Complement Fixation Tests; D006017:Glycolipids; D007106:Immune Sera; D005779:Immunodiffusion; D007740:L Forms / Q000032:analysis* / Q000254:growth & development; D011817:Rabbits / Q000276:immunology; D013291:Streptococcus / Q000276:immunology*
D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D006017:Glycolipids; D007106:Immune Sera