country disease
noun
Any disease believed to be common or endemic in a particular country, especially a treponemal disease (specifically syphilis or yaws) or dysentery or other diarrhoeal disease (now historical ); (in later use also) any disease more common in rural areas than in towns and cities (now rare ).
Origin
Mid 16th century; earliest use found in William Bullein (c1515–1576), physician.