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Ma·ya·ro virus | \ mä-ˈyä-rō- 
\
\Medical Definition of Mayaro virus
: a virus of the genus Alphavirus (species Mayaro virus) that is found in tropical South America, is transmitted by mosquitoes especially of the genus Haemagogus, and is the causative agent of an acute illness marked chiefly by fever, joint pain, and rash
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