MICHAEL ABBEY / SCIENCE PHOTO LIBRARY. MICHAEL ABBEY / SCIENCE PHOTO LIBRARY.
Light micrograph of a colony of rod-like bacteria, Clostridium botulinum, the cause of the serious food poisoning disease botulism in man. C. botulinum are normally soil inhabitants, with little or no invasive power; botulism results from the production of a variety of highly toxic proteins (exotoxins). Botulism (& less serious types of clostridial food poisoning) arise from the ingestion of food in which these organims have developed and formed exotoxins: preserved (eg tinned) foodstuffs are particularly susceptible. Mag. X 800 (35mm).
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