title: Identification of isolates of Clostridium perfringens types C and D by agglutination and fluorescent-antibody methods.
abstract: Agglutination and fluorescent-antibody methods were employed for screening Clostridium perfringens types C and D from 393 isolates of this organism. All of 50 strains which were isolated in Japan and were agglutinable with an antiserum prepared against a stock strain of type C no. 3182 toxigenically belonged to type C, but the antiserum showed no cross-agglutination with any of type C strains isolated in Denmark. All of the latter strains, however, were agglutinated by an antiserum prepared against a Danish strain, CWC11. Of 64 strains, showing heat-labile agglutinability by type D antiserum L9, 22 strains were toxigenically identified as type D strains which can be divided into three groups by the heat-stable antigens; no strains which were L-agglutination-positive but O-agglutination-negative were epislon-toxigenic. All of 13 strains, the heat-stable antigen of which was agglutinable by a type D antiserum VX81, were toxigenically type D strains. The results of fluorescent-antibody tests were almost in agreement with those of agglutination test with type C strains and completely with those of the O-agglutination test with type D strains. No beta-, epsilon- or delta-toxigenicity could be demonstrated in strains which were not agglutinated by our test sera for types C and D strains. Further examination of cultural properties of Japanese and Danish type C strains revealed that the two groups were considerably different in urease production, capsule formation, and delta- and alpha-toxigenicities.
mesh_terms: D000372:Agglutination Tests; D003016:Clostridium perfringens / Q000145:classification / Q000166:cytology / Q000276:immunology / Q000302:isolation & purification* / Q000378:metabolism; D003429:Cross Reactions; D005455:Fluorescent Antibody Technique; D007106:Immune Sera; D014118:Toxins, Biological / Q000096:biosynthesis
chemical_list: D007106:Immune Sera; D014118:Toxins, Biological