It was one of the earliest fish to be domesticated, and is one of the most commonly kept aquarium fish. A relatively small member of the carp family (which also includes the koi carp and the crucian carp), the goldfish is a domesticated version of a less-colourful carp (Carassius auratus) native to east Asia.
Causes Causes of warts and verrucas. Warts and verrucas are caused by the human papilloma virus (HPV), of which there are over 100 different types. The virus infects cells in the outer layer of your skin. Warts and verrucas can spread from person to person by direct skin contact.They can also spread by contact with floors or surfaces contaminated with the virus. Although warts are contagious, itâs thought that the risk of catching them is fairly low.arts and verrucas are usually caused by direct skin contact or contact with surfaces contaminated with the human papilloma virus (HPV). Itâs hard to completely avoid coming into contact with HPV but taking the following precautions can help prevent warts and verrucas. 1  Try not to touch other peopleâs warts or verrucas.
By Dr Ananya Mandal, MD. Verrucas (verrucae) or plantar warts are small, rough, raised or flattened lumps that occur over the pressure areas of the feet. These are commonly caused by infections with different strains of the human papilloma virus (HPV). The virus may be isolated from the skin cells of verrucae.errucas (verrucae) or plantar warts are small, rough, raised or flattened lumps that occur over the pressure areas of the feet.