Which of the following is true about thrush?

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It affects only older adultsIt is caused by gram-negative bacteriaIt appears as a growth-like lesion clinicallyIt is effectively treated with nystatin

Explanation

Thrush is a fungal infection that responds well to antifungal treatments such as nystatin. It is not limited to elderly patients, is caused by fungi rather than gram-negative bacteria, and does not typically present as a proliferative lesion.