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Botulism is a rapid onset, usually fatal disease caused by the botulinum toxin produced by the bacterium Clostridium botulinum.
Photosensitisation is inflammation of the skin, and occasionally the conjunctiva and cornea of the eye.
‘Calf scours’ is when young calves develop diarrhoea and become dehydrated. The scour can be white, yellow, grey or blood-stained, and is often foul-smelling.