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Etiologic Agents Associated With Croup
| Viral | Bacterial |
|---|---|
| Parainfluenza viruses | Mycoplasma pneumoniae |
| Influenza viruses | |
| Respiratory syncytial virus | |
| Human metapneumovirus | |
| Coronaviruses | |
| Human bocavirus | |
| Adenoviruses | |
| Measles | |
| Rhinoviruses | |
| Enteroviruses | |
| Herpes simplex viruses |
