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  • Lisamarie Lamb

Why Is Legionnaires Disease Dangerous?

Legionnaires disease is a potentially life-threatening illness caused by the legionella bacteria. While the name may not sound particularly menacing, the disease can have serious consequences for those who contract it. In this blog post, we will explore why legionnaires disease is dangerous and why it should not be taken lightly.


Rapid Onset

Legionnaires disease can strike suddenly, with symptoms appearing 2 to 10 days after exposure to the bacteria. These symptoms can range from mild, flu-like symptoms to severe pneumonia. The speed at which the disease progresses can catch individuals off guard, making early diagnosis and treatment crucial.


Pneumonia-like Symptoms

Legionnaires disease often presents as a severe form of pneumonia, with symptoms like high fever, cough, and difficulty breathing. This can lead to severe respiratory distress, especially in individuals with weakened immune systems or underlying health conditions.



Photo by Andrea Piacquadio


Potential for Outbreaks

Legionella bacteria thrive in warm water environments, such as hot tubs, cooling towers, and plumbing systems. When these systems are not properly maintained, there is a risk of legionella bacteria multiplying and causing outbreaks in buildings, hotels, or hospitals. These outbreaks can affect numerous individuals simultaneously, making it a public health concern.


High Mortality Rate

Legionnaires disease has a mortality rate that varies depending on factors like age and overall health. However, it can be fatal in up to 10% of cases. Prompt diagnosis and treatment with antibiotics are essential for improving the chances of survival.


Long-term Health Consequences

Survivors of legionnaires disease may experience lingering health issues, including fatigue, cognitive impairment, and reduced lung function. These long-term consequences can have a significant impact on an individual's quality of life.


In conclusion, legionnaires disease is dangerous due to its rapid onset, pneumonia-like symptoms, potential for outbreaks, high mortality rate, and long-term health consequences. It is essential to be aware of the risk factors and take preventive measures like contacting Assured Water to reduce exposure to legionella bacteria, such as proper maintenance of water systems and early medical intervention if symptoms occur. Ignoring the potential dangers of this disease can have severe consequences, making it crucial to stay informed and vigilant.

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