| High count (≥25 percent) |
| Chronic eosinophilic pneumonia (≥40 percent) |
| Eosinophilic granulomatosis with polyangiitis (EGPA; Churg Strauss) and active pneumonitis (≥30 percent) |
| Idiopathic acute eosinophilic pneumonia (≥25 percent) |
| Tropical pulmonary eosinophilia (40 to 70 percent) |
| Mild to moderate counts (<25 percent) |
| Connective tissue disease |
| Drug-induced pneumonitis (eg, due to NSAIDs, cocaine, nitrofurantoin, minocycline, sulfonamides, ampicillin, and others) |
| Fungal pneumonia |
| Idiopathic pulmonary fibrosis (<10 percent) |
| Pulmonary Langerhans cell histiocytosis |
| Sarcoidosis |
