Legionnaires' disease acquired its name in July 1976, when an outbreak of pneumonia occurred among people attending a convention of the American Legion at the Bellevue-Stratford Hotel in Philadelphia. Of the 182 reported cases, mostly men, 29 died. On January 18, 1977, the causative agent was identified as a previously unknown strain of bacteria, subsequently named "Legionella", and the species that caused the outbreak was named "Legionella pneumophila". Outbreaks of Legionnaires' disease receive significant media attention, but this disease usually occurs in single, isolated cases not associated with any recognized outbreak. When outbreaks do occur, they are usually in the summer and
Pneumocystis pneumonia The older species name "Pneumocystis carinii" (which now applies only to the "Pneumocystis" species that is found in rats) is still in common usage. As a result, "Pneumocystis" pneumonia (PCP) is also known as Pneumocystis jiroveci[i]" pneumonia and (incorrectly) as Pneumocystis carinii" pneumonia. Regarding nomenclature, when the name of "Pneumocystis" pneumonia (PCP) changed from "P. carinii" pneumonia to "P. jirovecii" pneumonia, it was at first asked whether "PJP" should replace "PCP". However, because the short name "PCP" was already well established among physicians that managed patients with "Pneumocystis" infection, it was widely accepted that that name could continue to be