Discussion
Ergotism is caused by ingestion of grains infected with
Answer: D
Ergotism is caused by grains infected with Claviceps purpurea.
This fungus infects the flowers of rye and other cereals and replaces the grain with a hard, dark sclerotium, the ergot. Ergot contains alkaloids such as ergotamine that constrict blood vessels and act on the nervous system, causing gangrene of the limbs or convulsions and hallucinations (the medieval 'St Anthony's fire').
Clostridium perfringens is a bacterium that causes food poisoning through an enterotoxin, Rhizopus stolonifer is bread mould, and Lactococcus lactis is a harmless lactic acid bacterium used in cheese making.
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