A Bite Worse Than Its Bark

A 62-year-old asplenic man presents with fever and Thrombocytopenia after a dog bite. Explore the life-threatening cause of his sepsis.

Capnocytophaga canimorsus


A 62-year-old man presented to the emergency department with a 1-day history of fever and 3-day history of chest pain. He had a history of coronary artery disease and splenectomy. On examination, he had three dog-bite wounds on his left hand. Laboratory studies revealed a white-cell count of 16,700 per cubic millimeter (reference range, 3900 to 10,200) and a platelet count of 3100 per cubic millimeter (reference range, 15,000 to 37,000). Review of a peripheral-blood smear was as shown. What is the etiology of his illness?

What is the most likely diagnosis?

Pasteurella multocida
Capnocytophaga canimorsus
Pasteurella canis
Babesia microti
Bacillus anthracis

Asplenia, Capnocytophaga canimorsus, Dog Bite, Sepsis, Thrombocytopenia

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