Legionellosis

10 Brote Activos

Legionellosis is a severe bacterial infection, most commonly presenting as pneumonia (Legionnaires' Disease), caused by Legionella bacteria. It is not contagious person-to-person and primarily affects individuals who inhale contaminated water droplets, especially older adults or those with weakened immune systems.

5
Países Afectados
3,003
Casos Recientes (30 días)
10
Brotes Activos
8d ago
Última Actualización
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¿Qué es Legionellosis?

Legionellosis first gained widespread recognition following a major outbreak in 1976 at an American Legion convention in Philadelphia, Pennsylvania. The causative bacterium, *Legionella pneumophila*, was identified by the CDC shortly after. This event significantly advanced public health understanding of waterborne diseases and the importance of environmental controls in buildings.

Síntomas

  • Fever and chills
  • Cough (may be dry or produce phlegm)
  • Muscle aches and headache
  • Shortness of breath
  • Chest pain
  • Fatigue
  • Gastrointestinal symptoms (nausea, vomiting, diarrhea)
  • Confusion or other mental changes (in severe cases)

Transmisión

Legionellosis is primarily transmitted through the inhalation of small water droplets (aerosols) containing *Legionella* bacteria. These contaminated aerosols are generated from man-made water systems such as cooling towers, hot tubs, showers, decorative fountains, and large plumbing systems. It is not known to spread directly from person to person.

Período de Contagio: Varies by disease

Prevención

  • Maintain water systems: Regularly clean and disinfect cooling towers, hot tubs, decorative fountains, and other engineered water systems.
  • Control water temperature: Keep hot water hot (above 120°F/49°C) and cold water cold (below 77°F/25°C) to inhibit bacterial growth.
  • Prevent stagnation: Flush unused water lines and showerheads periodically.
  • No vaccine available: Currently, there is no vaccine to prevent Legionellosis.

Live Legionellosis Global Case Map

5 countries with reported activity. Updated from real-time surveillance data.

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United States — State Detail

1 state with reported activity. Click a state for detailed surveillance.

Brotes Activos y Casos Recientes

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Legionnaires' Disease Cluster Hospitalizes Six in Victoria

Australia 2026-03-19
Activo

This event envelope contains reports on Legionnaire's disease cases, clusters and outbreaks in Australia.

Source: BEACON - View Full Report

Legionella bacteria found at 2 buildings in Oakland County Children's Village

United States Minor Outlying Islands, Baker Island 2026-03-07
Activo

Paula Wethington is a digital producer at CBS Detroit. She previously held digital content roles at NEWSnet, Gannett/USA Today network and The Monroe News in Michigan. She is a graduate of the University of South Carolina.

Water testing has detected what authorities called "low levels" of Legionella bacteria at two more Oakland County, Michigan, government buildings.

The bacteria were found within two facilities at Oakland County Children's Village, Building D (the boys' secure detention) and t

📰 11 news sources reporting on this story.

🔗 Read more at Yahoo

Legionnaires' Disease Outbreak Investigated in London Areas

United Kingdom 2026-03-09
Activo

This event envelope contains reports on Legionnaires' diseases cases, clusters and outbreaks in the UK.

Source: BEACON - View Full Report

Ritenour teacher discloses Legionnaires hospitalization during school year

United States Minor Outlying Islands, Baker Island 2026-06-20
Activo

ST. LOUIS COUNTY, Mo. - An elementary school in the Ritenour School District will remain closed after a teacher there disclosed that she had been hospitalized for Legionnaires' disease during the school year.

In separate statements to staff and families in the district and Marvin Elementary School, Superintendent Dr. Chris Kilbride said administrators learned late Tuesday evening that a teacher said she was ill in late April and early May and had been hospitalized for Legionnaires.

The teacher

📰 12 news sources reporting on this story.

🔗 Read more at https://www.firstalert4.com

UK health agency investigating London Legionnaires' disease cluster

United Kingdom 2026-03-09
Activo

The wider risk to public health is said to be low as the disease is not usually passed from person to person. Specialists from Britain's Health Security Agency (UKHSA) are investigating a cluster of Legionnaires' disease cases linked to north and southwest London. The public health body is working to discover whether the cases are linked and to establish their possible source. Legionnaires' disease is a severe pneumonia, which is caught by breathing in tiny droplets of water containing Legionella bacteria. These usually come from sources such as air conditioning systems, showers and taps which are not properly designed, installed or maintained. To become infected with the disease, Legionella bacteria in the air have to be inhaled as tiny water droplets from a contaminated source. The wider...
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London Legionnaire's outbreaks under investigation

United Kingdom, England 2026-03-11
Activo

An unexpected increase in cases of Legionnaires' disease in parts of north-west and south-west London is being investigated by The UK Health Security Agency (UKHSA).

Specialists are trying to find out if the cases are linked and to establish the possible source of the disease.

Experts are looking at each case of the disease to have broken out this year, interviewing patients or their families to retrace their steps to find out if there is a common link, the UKHSA said.

The disease - a severe f

📰 11 news sources reporting on this story.

🔗 Read more at getwestlondon

13 confirmed cases of legionellosis in Hamilton under investigation: public health | CBC News

Canada, Alberta 2026-05-09
Activo

The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results.

Hamilton Public Health is investigating several confirmed cases of legionellosis in the city's east end and Stoney Creek area.

In a news release Friday, the city said 13 cases of legionellosis -- a lung infection caused by legionella bacteria -- have been reported since May 4. Public health officials are working to id

📰 11 news sources reporting on this story.

🔗 Read more at Pulse24.com

Legionnaires' Disease Outbreak Investigated in Toronto: Nine Cases

Canada 2026-05-06
Activo

This event envelope contains reports on legionellosis in Canada.

Source: BEACON - View Full Report

Legionella bacteria cases confirmed at Kaiser Permanente in Santa Clara

United States, Alaska 2026-05-08
Activo

Tim Fang is a digital producer at CBS Bay Area. A Bay Area native, Tim has been a part of the CBS Bay Area newsroom for more than two decades and joined the digital staff in 2006.

A hospital in Santa Clara County is working to find the source of contamination that led to several people being infected by Legionella bacteria.

Officials at Kaiser Permanente Santa Clara said Tuesday they have confirmed several cases of people being infected by the bacteria. Legionella occurs naturally in water and

📰 15 news sources reporting on this story.

🔗 Read more at https://www.atlantanewsfirst.com

Legionnaires' Cluster Investigated at California Hospital: 18 Cases

United States 2026-05-09
Activo

This envelope includes reports on legionellosis (clusters and outbreaks) in the United States.

Source: BEACON - View Full Report

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Recursos Expertos y Referencias

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CDC

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WHO

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Contenido Revisado Médicamente

La información sobre enfermedades en Virus Watcher es revisada por nuestro Epidemiólogo Jefe, ex analista principal del CDC para el pronóstico FluSight. Los datos de brotes se agregan de fuentes verificadas incluyendo BEACON, ProMED, OMS, CDC y más de 50 agencias nacionales de salud. Esta información es con fines educativos y no debe reemplazar el asesoramiento médico profesional.

Última revisión: 2026-06-29

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