Indications for Legionella testing
| Atypical symptoms including but not limited to altered mentation, pleuritic chest pain, and diarrhea |
| Admission to intensive care unit |
| High-risk patient features including immunosuppression, chronic lung disease, history of smoking, and age older than 50 |
| Hypoxemia and increasing oxygen requirements |
| Recent travel (ie, within 2 weeks of initial presentation) |
| Concern for community or nosocomial pneumonia outbreak |