Legionella.
D002487:Centers for Disease Control and Prevention, U.S.; D003428:Cross Infection / Q000453:epidemiology / Q000517:prevention & control; D006801:Humans; D007165:Immunosuppression Therapy / Q000009:adverse effects; D007876:Legionellosis / Q000453:epidemiology* / Q000517:prevention & control; D011183:Postoperative Complications / Q000382:microbiology / Q000517:prevention & control; D014180:Transplantation / Q000009:adverse effects*; D014481:United States