Psittacosis differential diagnosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aditya Govindavarjhulla, M.B.B.S. [2]
Overview
Psittacosis must be differentiated from other diseases that cause atypical pneumonia, febrile illness without localizing signs and extrapulmonary manifestations such as gastroenteritis, hepatitis, meningitis, or encephalitis.
Differentiating Psittacosis from other Disease
Psittacosis can be differentiated in 3 categories based on the manifestations of the patient. For the patient with a typical pneumonia, other conditions to consider include;
- Chlamydia pneumoniae,
- Mycoplasma pneumoniae, and
- Legionella infection
For the patient who presents with febrile illness without localizing signs, the following should also be considered;
- Influenza,
- Endocarditis,
- Septicemia,
- Vasculitis,
- Coxiella burnetii infection,
- Leptospirosis, and
- Brucellosis
When extrapulmonary manifestations predominate, the following should be considered;
- Gastroenteritis,
- Hepatitis,
- Meningitis, or
- Encephalitis.