Erysipelothrix rhusiopathiae pneumonia in an immunocompetent patient

Area of Science:

• Microbiology
• Infectious Diseases
• Pulmonary Medicine

Background:

• Erysipelothrix rhusiopathiae is a Gram-positive bacterium predominantly known to infect animals.
• In human cases, it typically manifests as localized cutaneous infections, termed erysipeloid.
• The spectrum of human infections caused by this pathogen is not fully elucidated.

Observation:

• A case of pneumonia is presented involving a patient with isolation of Erysipelothrix rhusiopathiae.
• The bacterium was successfully identified from bronchoalveolar lavage and sputum samples.
• This clinical presentation is unusual for Erysipelothrix rhusiopathiae infections in humans.

Findings:

• This report details the first documented case of pneumonia caused by Erysipelothrix rhusiopathiae.
• The diagnosis was confirmed through microbiological culture of respiratory specimens.
• The findings expand the known clinical manifestations of Erysipelothrix rhusiopathiae in humans.

Implications:

• This case highlights the potential for Erysipelothrix rhusiopathiae to cause severe pulmonary infections.
• It underscores the importance of considering this bacterium in the differential diagnosis of pneumonia, particularly in specific epidemiological contexts.
• Further research may be warranted to understand the pathogenesis and treatment of E. rhusiopathiae pneumonia.