Scurvy
Scurvy was a Human disease that was common on Earth during the 19th century commonly caused by insufficient Vitamin C.

During the 's visit to the Melkotian planet in 2268, the landing party joined Captain James T. Kirk's Melkotian experience of Earth's Ancient West where Wyatt Earp described the cadre as a "horse-stealing scurvy crew." ()

External link 
 
Medical conditions