Bubonic plague.

A 19-year-old man, recently returned from a 10-day military exercise in central California, had acute onset of shaking chills, headache, and bilateral inguinal adenopathy after having been bitten by insects on his lower extremities. He had exquisitely tender inguinal and femoral nodes bilaterally. Needle aspirate from an inguinal node grew Yersinia pestis. The patient was treated with streptomycin and chloramphenicol and did well.