Botulism is a rare but serious paralytic illness caused by a nerve toxin produced by the bacterium Clostridium botulinum (klos-trih-dee-um bot-u-li-num). Human botulism is mainly caused by four of the seven recognized types of Clostridium botulinum bacteria: types A, E, rarely F and possibly G. The recorded history of botulism began in 1735, when the disease was first associated with the consumption of sausage.
Warts occur in a variety of shapes and sizes. A wart may appear as a bump with a rough surface, or it may be flat and smooth. Tiny blood vessels (capillaries) grow into the core of the wart to supply it with blood.
There are about six different types of warts, which are categorized by shape and body location. 1  The common wart: These warts are rough and firm to the touch. 2  Plantar warts â a.k.a. warts on feet: These warts can grow anywhere on the foot, but the soles of the feet are most common. 3  Flat warts: These warts are most common amongst children.