immunological studies by electron microscopic examination of fibril-antibody immunocomplexes , whole bacterial cell agglutination , inhibition of hemagglutination , and immunofluorescence by using antifibril antisera and antibodies demonstrated that strains of typical a. naeslundii ( cluster 5 ) have a specific fibril-associated antigen ( s ) distinct from those of strains of other clusters .
C0020960
antisera
C0003241
antibodies