CASE 55 A 48-year-old man presented to an internist for a physical exam, since he had not been to a physician for many years. He was asymptomatic, but routine chemistry…

CASE 22 A 23-year-old man was admitted to the hospital for fever, nonproductive cough, progressive shortness of breath, and fatigue for 2 weeks. He had been diagnosed as HIV positive…

CASE 31 A 26-year-old woman came to a city sexually transmitted disease (STD) clinic complaining of a profuse yellow, foamy vaginal discharge with foul odor. The discharge began 2 days…

CASE 17 Five workers between the ages of 29 and 48 years presented to an acute care clinic with a 1-week history of fever, chills, night sweats, cough, headache, fatigue,…

CASE 26 A 31-year-old African American woman presented with low-grade fever, malaise, and a rash. She recalled having had painless ulcers, which appeared on the vulva one month before this…

CASE 15 A 32-year-old Hispanic woman presented with a cough for several weeks and a 15-lb weight loss. She also had night sweats and subjective fevers and felt fatigued. Despite…

CASE 49 A 3-year-old girl was brought to the emergency department of a general hospital following a 3-week history of nausea, poor appetite, and abdominal pain. She had not had…

CASE 24 A 62-year-old white man was admitted to the hospital in the month of January with fever, shortness of breath, productive cough, and chest pain. He also complained of…

CASE 44 Within 48 hours of a college football game in Philadelphia, 158 students with symptoms of gastrointestinal disease visited the university health service. The predominant symptoms included nausea in…

CASE 25 A 24-year-old sexually active woman visited a family practice clinic because of burning pain during urination, increased frequency, and urgency for 1 day. She also complained about blood-stained…