A 23-year-old woman has difficulty opening her mouth and a low-grade fever of several days. Her medical history includes a recent positive PPD skin test, and she is taking rifampin. There is diffuse swelling at the angle of the right mandible and the lateral neck, and gingival swelling and erythema around partially erupted tooth #32. Prior to extracting tooth #32, surgery is done to expose the entire crown of the tooth. Which of the following should the dentist expect to see?