A 12-yeаr-оld bоy is brоught to your office by his mother. He is complаining of right eаr pain for the last 24 hours. The mother states the patient spent the last four days swimming in the pool and began to complain of pain in the right ear yesterday afternoon. The patient also states he has been using cotton swabs in his ear to remove excess water. On examination, the patient is afebrile. Otoscope examination is significant for clear fluid material in the ear canal, which is inflamed. There is tenderness to the pinna. What is the most likely diagnosis?