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1990:
Sakaguchi G; Sakaguchi S; Kamata Y; Tabita K; Asao T; Kozaki S
Distinct characters of Clostridium botulinum type A strains and their toxin associated with infant botulism in Japan.
International journal of food microbiology 1990;
11(
3-4):.
Four strains of Clostridium botulinum type A having been associated with infant botulism in Japan, and another strain isolated from honey not associated with infant botulism, were found to be hemagglutinin (HA) negative. These strains do not produce L (Mr 500 kDa) nor LL toxin (Mr 900 kDa) but M toxin (Mr 300 kDa) only. No marked difference was found between the HA-positive and HA-negative strains in other biochemical properties, but the HA-negative strains tended to colonize more easily in the intestines of infant mice than did HA-positive strains. The toxin of HA-positive strains and that of HA-negative strains differed in the antigenicity of part of the toxic component and that of the nontoxic component, and in the molecular size of the toxic component.
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