corynebacterium bacteria, gram-positive rod-d bacterium that causes diphtheria

diphtheria infection corynebacterium bacterium respiratory microscopic illustration diphtheriae background micro microbe microbiology microorganisms tonsils rodshaped medicine science scientific sick organism macro research closeup 3d microscope human biology bugs sickness disease ulcerans medical illness grampositive threedimensional fever bacteria vaccine biological pathology health epidemic diphtheroid nondiphtheria pseudotuberculosis amycolatum jeikeium prosthetic joint endocarditis