Generate a correct and concise answer for the question based on the words in the context.

Context : Dr. John Croghan (April 23, 1790 -- January 11, 1849) was an American medical doctor who helped establish Louisville Marine Hospital and organized some tuberculosis medical experiments and tours for Mammoth Cave, in Kentucky (U.S.) during 1839-1849.
Question : What medical condition killed John Croghan?
tuberculosis