An 8-year-old girl was evaluated for fevers of 39.4°C that developed 10 days after returning from a family camping trip. She complained of diffuse headache, nausea, and occasional emesis. Before her illness, 3 transient erythematous papules resembling insect bites on her abdomen were noted. Sore throat, cough, conjunctivitis, diarrhea, arthralgias, and myalgias were absent. Her symptoms, includ...