THE MERCK MANUAL: The Merck Manual of Diagnosis and Therapymultimedia

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  • Diphtheria
  • Diphtheria (Nasopharyngeal Membrane)

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    Diphtheria (Nasopharyngeal Membrane)

    Toxigenic strains of Corynebacterium diphtheriae may cause a thick pharyngeal exudate. The exudate is dirty gray and is tough, fibrinous, and adherent to the mucosae.

    Image courtesy of the Centers for Disease Control and Prevention.