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Differential diagnoses of leptospirosis
| Influenza | Dengue |
| Hantavirus | Yellow fever |
| Viral hemorrhagic fevers | Rickettsiosis |
| Borreliosis | Brucellosis |
| Malaria | Pyelonephritis |
| Septic meningitis | Lyme disease |
| Chemical poisoning | Food poisoning |
| Typhoid fever | Enteric fevers |
| Viral hepatitis | Fever of unknown origin |
| Primary HIV seroconversion | Legionnaire's disease |
| Toxoplasmosis | Infectious mononucleosis |
| Pharyngitis | - |
