A previously healthy 18-year-old woman presents with sore throat and pain with swallowing. Her vital signs are T 102.7°F, HR 124, BP 123/76, RR 22, and oxygen saturation 97%. On examination she has trismus, pain with neck extension, and difficulty swallowing her saliva. Her oropharyngeal examination is unremarkable. What is the most appropriate next step in management?
