For 10 points, identify this disease, whose name is denoted by D in the DPT vaccine.
HtaA and HtaB are proteins implicated in foreign hemin binding in the causative agent of this disease, which releases a toxin that ADP ribosylates a modified histidine residue in EF2, thus inhibiting translation. Bela Schlick developed a test for susceptibility to this disease, while Emil Behring and Emile Roux developed a serum therapy to counteract this disease. Caused by a Corynebacterium, it is most commonly associated with a gray or black coating at the back of the throat which causes difficulty in breathing and swallowing. For 10 points, identify this disease, whose name is denoted by D in the DPT vaccine.
HtaA and HtaB are proteins implicated in foreign hemin binding in the causative agent of this disease, which releases a toxin that ADP ribosylates a modified histidine residue in EF2, thus inhibiting translation.
{Diphtheria} [accept {Corynebacterium diphtheria} until “{agent}” in the first clue]