myxomatosis
noun(myx-o-ma-to-sis)
a condition characterized by the presence of myxomas in the body; specifically : a severe virus disease of rabbits that is caused by a poxvirus (species Myxoma virus of the genus Leporipoxvirus) and transmitted by mosquitoes, biting flies, and direct contact and that has been used in the biological control of rabbits especially in Australia