A 36-year-old woman was referred to our department with a 4-day history of spiking fever up to 100.4 °F, nausea, vomiting and loss of appetite. She also complained of slight dyspnea and a mild cough, without thoracic pain. There were no significant medical antecedents, she had a negative smoking history, and had never experienced similar symptoms previously. She had not traveled recently, nor visited bathing areas, although, she often resided in hotel rooms with air-conditioning.