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Important Facts for Legionellosis Incidence Rate in New Jersey


Legionellosis refers to confirmed reported cases of legionellosis in New Jersey (both Pontiac Fever and Legionnaire's Disease). Incidence: Rate of reported legionellosis infections per 100,000 people


Confirmed reported legionellosis cases in New Jersey


Population of New Jersey (annual)

Why Is This Important?

Legionellosis refers to infections caused by Legionella species of bacteria. It includes both Legionnaire's Disease, a severe form of pneumonia, and Pontiac Fever, a flu-like illness that is usually self limiting. Legionella is a naturally occurring bacteria commonly found in warm water sources such as large plumbing systems, hot water tanks, cooling towers, hot tubs, respiratory equipment, and decorative fountains. Disease transmission is not person-to-person. Instead, a person must breath in water droplets, mist, or vapor contaminated with the bacteria to become infected. Those at greatest risk of developing legionellosis are elderly persons, current and former smokers, persons with chronic lung diseases, and immunocompromised persons. Legionellosis has been a reportable disease in New Jersey since 2003.

How Do We Compare With the U.S.?

While the incidence rate of legionellosis is increasing in both the United States and New Jersey, the annual rates have been higher in New Jersey for many years. CDC data show that the rate of legionellosis in the U.S. was 1.89 cases per 100,000 people in 2015. For the same year, the rate in New Jersey was 2.4 cases per 100,000 people. In 2018 the rate in New Jersey had increased to 4.1 cases per 100,000 people.

Health Program Information

The NJ Department of Health has both general and technical information available online for Legionellosis at []. A Legionellosis fact sheet with frequently asked questions is at [].
The information provided above is from the Department of Health's NJSHAD web site ( The information published on this website may be reproduced without permission. Please use the following citation: " Retrieved Mon, 04 March 2024 17:47:09 from Department of Health, New Jersey State Health Assessment Data Web site: ".

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