Table 1. Description of cases from whom Legionella was isolated during the 1976 Legionnaires' disease outbreak in Philadelphia.

Original Isolate Designation	Final Strain Designation	Original Isolation Date	Source of Isolate	Age	Sex	Ethnicity	Occupation	Convention Affiliation	Potential Exposure	Hotel of Residence	Pre-existing Conditions	Peak Temperature (°F) During Illness	Date of Disease Onset	Date of Death and Sample Collection	Potential Exposure to Disease Onset (Days)
Legionnaires' Isolate #1	Philadelphia-1	1/11/1977	Autopsy lung tissue	47	Male	Caucasian	Bus driver	Broad Street Pneumonia	Single day exposure—stood on the sidewalk in front of hotel A to watch parade on 7/23	None	Obesity and light smoker	105.2	7/28/1976	8/2/1976	5
Legionnaires' Isolate #2	Philadelphia-2	1/11/1977	Autopsy lung tissue	41	Male	Caucasian	Publishing consultant/salesman	Legionnaire—Delegate	Attended one or more Legion meetings from 7/21-7/24	Hotel E	Alcoholism, diabetes, obesity, moderate smoker	105	7/26/1976	8/2/1976	2–5
Legionnaires' Isolate #3	Philadelphia-3	1/16/1977	Autopsy lung tissue	55	Female	Caucasian	Retired hospital laboratory staff	Wife of Legionnaire	Waited in the lobby of Hotel A on more than one occasion, 7/21-7/24	Hotel E	History of myocardial infarction and atrial and ventricular tachycardia, heavy smoker, high blood pressure, hyperlipidemia, chronic cough	105.4	7/24/1976	8/4/1976	0–3
Legionnaires' Isolate #4	Philadelphia-4	1/16/1977	Autopsy lung tissue	63	Male	Caucasian	Retired machinist/coal miner	Legionnaire—Delegate	Attended one or more Legion meetings, hospitality rooms, and parade from 7/21-7/24	Hotel E	Emphysema, moderate smoker	105	7/25/1976	8/5/1976	1–4