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Passive hemagglutination and agar gel double diffusion tests demonstrated cross reactions between Clostridium botulinum type A and B toxins to a high level and between types E and F and types A and F to a much lower level. The cross reactions between types A and B and types A and F were due to the nontoxic component ; that between types E and F to both the toxic and nontoxic components. Anti-toxic component immunoglobulins types A and B were isolated from anti-progenitor toxin of the corresponding types by affinity chromatography. Reversed passive hemagglutination tests with formalinized sheep red blood cells coupled with anti-toxic component immunoglobulins type A or B caused no cross reaction between these types and detected 8-89 LD50/ml of type A and 10-59 LD50/ ml of type B toxins in either a crude or purified form. Direct hemagglutinin possessed by type A and some type B toxins did not disturb the reversed passive hemagglutination tests.

japanese journal of medical science and biology/japanese journal of medical science and biology

CROSS REACTION IN REVERSED PASSIVE HEMAGGLUTINATION BETWEEN CLOSTRIDIUM BOTULINUM TYPE A AND B TOXINS AND ITS AVOIDANCE BY THE USE OF ANTITOXIC COMPONENT IMMUNOGLOBULIN ISOLATED BY AFFINITY CHROMATOGRAPHY