Diphtheria

Diphtheria is caused by the bacterium Corynebacterium diphtheriae.
The infection is spread by direct contact with an infected individual, as well as by the airborne droplet spread of discharge from the nose or throat of an infected person. Transmission by way of clothing or bedding soiled with nose or throat discharge is rare. Raw milk has also been implicated as a vehicle of transmission.

Source: Public Health Agency of Canada