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Myxomatosis is a disease caused by Myxoma virus, a poxvirus in the genus Leporipoxvirus. The natural hosts are tapeti ( Sylvilagus brasiliensis ) in South and Central America, and brush rabbits ( Sylvilagus bachmani ) in North America.
Myxoma virus is a poxvirus in the genus Leporipoxvirus. The two broad geographic types of myxoma virus are Californian and South American. Californian myxoma virus is found on the West Coast of the United States, the Baja Peninsula of Mexico, and the southwest coast of Canada.
Myxoma is a rare, benign stromal tumor of mesenchymal origin often confused with other conjunctival stromal tumors. Conjunctival myxomas are thought to originate in Tenon's capsule and can masquerade as conjunctival lymphoma, lymphangioma, ocular surface squamous neoplasia (OSSN), or amelanotic melanoma.
Brush rabbits are a natural carrier of the myxoma virus, a poxvirus in the genus Leporipoxvirus. This virus causes only a mild disease in brush rabbits, but causes a severe and usually fatal disease called myxomatosis in European (pet) rabbits. The disease is usually transmitted from one rabbit to another by biting insects. [10]
Myxomatosis is a virus disease of rabbits which can be fatal. The symptoms are swelling of the eyelids and lips, conjunctivitis and the formation of skin tumours on the face, ears and limbs. The rabbit flea acts as a vector for the disease and the virus has been shown to remain viable in the flea's mouthparts for at least one hundred days. [5]
A legal vaccine exists in Australia for RHD, but no cure is known for either myxomatosis or RHD, and many affected pets have to be euthanized. In Europe, where rabbits are farmed on a large scale, they are protected against myxomatosis and calicivirus with a genetically modified virus [38] developed in Spain.
European rabbits in Australia 2004 Load of over 3,800 rabbits at Mudgee caught during 1919 plague Rabbits around a waterhole at the myxomatosis trial enclosure on Wardang Island in 1938 Boy with rabbits caught during plague in 1949 near Kerang Rabbits in Warren, New South Wales during a plague in 1949 Releasing the Myxoma virus for Rabbits c. 1937 Wild rabbit in Australia The Rabbit-Proof ...
A cutaneous myxoma, or superficial angiomyxoma, consists of a multilobulated myxoid mass containing stellate or spindled fibroblasts with pools of mucin forming cleft-like spaces. There is often a proliferation of blood vessels and an inflammatory infiltrate.