Epidemiologic, clinicopathologic, and diagnostic findings in pet rabbits with myxomatosis caused by the California MSW strain of myxoma virus: 11 cases (2022-2023).

Clinical signs of myxomatosis caused by the MSW strain of myxoma virus are distinctive but subtle. Cases occur regularly in the Santa Cruz and San Jose regions of California. As infection with this virus is almost 100% fatal and no vaccine is available in the US, owners of domestic rabbits in endemic areas should keep their pets indoors or behind mosquito screens. Myxomatosis is a reportable disease in the US, and the appropriate state or federal agencies should be contacted when outbreaks occur.