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.
Verruca: A wart by another name, a local growth of the outer layer of the skin (the epidermis) caused by a virus. The virus of warts (a human papillomavirus) is transmitted by contact. The contact can be with a wart on someone else or one on oneself (autoinoculation). Warts that occur on the hands or feet are called common warts. A wart on the sole of the foot is a plantar wart. Genital (venereal) warts are located on the genitals and may be transmitted by sexual contact. The word wart is from Old English and far back as the 8th century referred to a wart. The name verruca is Latin for wart. A common wart is a verruca vulgaris.