Being Licked by a Dog Can Be Fatal: Capnocytophaga canimorsus Sepsis with Purpura Fulminans in an Immunocompetent Man

Bite infections caused by Capnocytophaga canimorsus are rare. Severe and fatal infections are more frequently reported in patients with immunodeficiency, splenectomy or alcohol abuse. We describe the case of a 63-year-old man who developed flu-like symptoms and presented after some delay with severe sepsis and purpura fulminans. He was found to be infected with C. canimorsus without a bite injury and did not demonstrate immunodeficiency or any other typical predisposition. Despite extensive intensive care, his conditions deteriorated and he died from multiorgan failure. LEARNING POINTS: Pet owners with banal, for instance flu-like, symptoms should urgently seek medical advice when symptoms are unusual. Capnocytophaga canimorsus infection should be considered and empirical antibiotic therapy immediately started or adjusted in the presence of purpura fulminans in the absence of animal bites or immunodeficiency.