For each patient, an initial visit and at least one follow-up visit at the end of treatment should be documented by the treating physician in the case report form.

Inclusion Criteria:

• Any patient with a diagnosis of acute bacterial sinusitis treated with Avelox® - in accordance with the local production information.

Exclusion Criteria:

• Those specified in the local product information - contraindications and precautions must be considered.

Patients with a diagnosis of acute bacterial sinusitis who take moxifloxacin