Health Alert: Legionnaire's Disease in Hampton, NH

On August 25, 2018, NH DHHS issued a health alert regarding a cluster of Legionella pneumophila Pneumonia (Legionnaire’s Disease) associated with an area of Ashworth Avenue in Hampton, NH.

Key Points and Recommendations:

1. The New Hampshire Division of Public Health Services (DPHS) has confirmed four patients with Legionella pneumonia (also known as Legionnaire’s Disease) associated with Ashworth Avenue between Island Path and H Street in Hampton, New Hampshire.

2. These four cases likely acquired disease in late July or early August, based on clinical symptoms and the incubation period of Legionella bacteria.

3. NH DPHS is working with the Department of Environmental Services (DES) to identify potential sources of exposure and mitigate risk of additional cases.

4. Health care providers should consider Legionella infection when evaluating community-acquired pneumonia and ask patients about travel (including local travel) in the 10 days prior to symptom onset.

5. Diagnostic testing for Legionella infection should include both urine antigen and culture of respiratory specimens. The New Hampshire Public Health Laboratories is available to support testing.

6. While the investigation is underway, in an abundance of caution, DPHS has recommended that people who are at increased risk for severe disease from Legionella may consider postponing their visit to the area of Ashworth Avenue between Island Path and H Street in Hampton, New Hampshire. People who are at increased risk include those who are older than 50, who have chronic respiratory disease, or who have a weakened immune system.

7. Healthcare providers should report suspected and confirmed cases of Legionella infection to the Bureau of Infectious Disease Control at 603-271-4496 (after hours 603-271-5300).