The most notorious outbreak of Legionnaires’ was in Philadelphia in 1976, when approximately 200 people attending a hotel convention contracted the disease, and 34 died.

Until the source of the outbreak is found, visitation and volunteer programs are suspended, reported the article.

The disease is named after a 1976 outbreak at an American Legion convention in Philadelphia that killed 34 people and made 221 others sick.

The source of the bacteria hasn’t been determined, but Drummond said the health department is confident it’s limited to the veterans home.

Legionnaires’ disease is a serious form of pneumonia that is spread from aerosolized water that has Legionella bacteria.

State and local health departments are asked to report cases to the CDC, many cases aren’t reported, including many hospitalizations.

The new cases increase the number of residents contaminated at the Quincy veterans’ home to 29. Tests were pending Tuesday for other residents.

An epidemiological team from the federal Centers for Disease Control and Prevention in Atlanta came to Quincy on Monday to assist the state investigation.

The California Department of Corrections and Rehabilitation (CDCR) has been searching for the source of the Legionnaires’ disease and testing all inmates that show any pneumonia-like symptoms.

Legionella bacteria commonly grow and thrive in water systems, such as cooling towers, water tanks, hot tubs, fountains, and plumbing systems in large buildings.

City of Phoenix officials tell ABC15, it’s an internal issue with the VA and the water going into the facility was clean.

Also in August, California officials were determining the origin of a Legionnaires’ outbreak at San Quentin State Prison that had sickened at least five inmates and left dozens more under observation.