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Cat-scratch disease
From WikEM
Contents
Background
- Caused by Bartonella henselae
Clinical Features
- History of cat (normally kitten) exposure
- Lymphadenitis proximal to exposure
Parinaud's oculoglandular syndrome
- Due to direct inoculation of the eye
- Causes conjunctivitis, ocular granuloma, periauricular adenopathy
Differential Diagnosis
Evaluation
Work-up
- Indirect fluorescence assay (IFA) or ELISA testing
Evaluation
- Generally clinical diagnosis
Management
- Immunocompetent
- Adult (>45kg): Azithromycin 500mg PO x1, then 250mg/day x 4 days
- Child (<45kg): Azithromycin 10mg/kg x1, then 5mg/kg per day x 4 days
Disposition
- Admit if immunocompromised or evidence of systemic disease.
- Otherwise discharge with PCP follow-up.
