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.
1 Warts are small rough lumps on the skin. 2  They are caused by a virus (human papillomavirus) which causes a reaction in the skin. 3  Warts can occur anywhere on the body but occur most commonly on hands and feet. 4  They range in size from 1 mm to over 1 cm.arts are usually harmless but may be unsightly. Warts on the feet are called verrucas (or verrucae) and are sometimes painful. Warts and verrucas usually clear in time without treatment.