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Abstract
Nineteen Clostridium perfringens strains with positive erythemal and ligated intestinal loop reactions, and 22 strains with negative reactions, originating from food-poisoning cases, were tested comparatively using the fluorescent antibody (FA), reversed passive hemagglutination (RPHA), and immunodiffusion (ID) tests. All the biologically positive strains were detected by the three immunological tests used. The FA test detected five additional strains among the biologically negative group which did not react in RPHA or ID tests. Sporulating culture supernatant fluids, after 13 to 17h of growth, were satisfactory for testing for the presence of enterotoxin by the RPHA and ID tests. The FA test was used on cell smears.
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