Q. A 23 year-old woman presents with a rapidly progressive stupor (loss of alertness). She had been complaining of headache since last night. You detect a positive Kernig sign on exam (with the hip in flexion, the patient exhibits pain with knee extension) and also a positive Brudzinski sign on exam (the patient flexes the legs at the hip when you flex her neck toward her chest). A noncontrast head CT rules out subarachnoid hemorrhage. You suspect bacterial meningitis. Which of the following would you expect to find on her cerebrospinal fluid test?