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Chromobacterium violaceum Infection in Two Dogs

From the Departments of Small Animal Clinical Sciences (Crosse, Soares, Wheeler, Cooke, Adin, Levy) and Physiological Sciences (O’Kelley), College of Veterinary Medicine, University of Florida, Gainesville, Florida 32610.

Address all correspondence to Dr. Levy.

Chromobacterium violaceum is a saprophyte of soil and water in tropical and subtropical environments that is associated with rare but highly fatal infections in animals and humans. Systemic infection was diagnosed in two critically ill dogs from Florida. Fever was absent in both dogs. Both dogs were treated surgically and provided with intensive care, but only one survived. The identification of characteristic, violet-pigmented bacterial colonies on routine microbial cultures should alert microbiologists and clinicians to the likelihood of this dangerous pathogen. Because of the rapidly progressive nature of this infection, empirical antibiotic administration with fluoroquinolones should be employed pending susceptibility testing.