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.
How verrucas spread. Like other warts, verrucas are caused by strains of papillomavirus (usually papillomavirus type 1). There is lots of papillomavirus around, and many people carry it on the surface of their skin. It does not cause any harm unless it penetrates into the skin, where it can take hold and cause a wart.over the verruca with a piece of the tape for 6 days. If the tape falls off, put a new piece on. Remove the tape after the 6 days, soak your foot in luke-warm water, and gently scrape off any dead cells with a blunt instrument (not a sharp knife or corn knife).