scorbutus

The etymology of scurvy is debated. The English word may come from the adjective 'scurfy' (scaly, flaky), or it may be related to the Medieval Latin scorbutus, which possibly derives from Old Norse skyrbjugr — from skyr (curds, a dairy product) and bjugr (swelling, edema). Another theory traces scorbutus to Dutch scheurbuik (torn belly). The uncertainty is fitting for a disease that was itself misunderstood for centuries. Sailors knew scurvy killed. They did not know why.

Scurvy is caused by vitamin C deficiency. Without ascorbic acid, the body cannot produce collagen, and collagen holds everything together — skin, blood vessels, bone, gum tissue. After eight to twelve weeks without vitamin C, sailors' gums bled, their teeth loosened, old wounds reopened, and their joints swelled. Death followed if the deficiency continued. Vasco da Gama lost two-thirds of his crew to scurvy during his 1497-1499 voyage around Africa. Magellan's circumnavigation (1519-1522) lost four out of five men, many to scurvy.

James Lind, a Scottish naval surgeon, conducted one of the first controlled clinical trials in medical history in 1747. He divided twelve scurvy patients into six pairs, gave each pair a different dietary supplement, and found that the two men who received oranges and lemons recovered within days. He published his results in 1753. The British Navy did not require citrus rations for another forty years, until 1795. The gap between evidence and policy killed thousands of sailors whose deaths were, after 1753, preventable.

The word scurvy entered English as both a noun (the disease) and an adjective (contemptible, worthless — 'a scurvy trick'). The adjective meaning predates the medical one. To be scurvy was to be low, vile, barely human — the same qualities that the disease imposed on its victims. The word for the condition and the word for contempt merged because the disease stripped people of their dignity before it killed them.