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Differentiating Features in Acute Conjunctivitis

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Etiology	Discharge/Cell Type	Eyelid Edema	Node Involvement	Itching
Bacterial	Purulent/polymorphonuclear leukocytes	Moderate	Usually none	None
Viral	Clear/mononuclear cells	Minimal	Often present	Usually None
Allergic	Clear, mucoid, ropy/eosinophils	Moderate to severe	None	Mild to intense