Robert, a 50-year-old male, presents to his primary care physician with a 3-month history of fevers, night sweats, productive cough, and an 11-kilogram weight loss. He is not an intravenous drug user (IVDU) or homosexual, but admits to numerous heterosexual encounters. The patient was released from jail 3 years ago, has a past history of numerous stab wounds, and is a confirmed alcoholic. Acid-fast stains of his sputum are positive and the bacteria were isolated from the right middle lobe of his lung. (6 points)
What organism is Robert infected with?
Give an example of two other sites of the body that might be attacked by this bacterium, apart from the lung. (2 points)
What risk factors does Robert have for infection with this organism? (3 points)