Recently, the news of a 7-year-old girl in critical condition after being bitten by a krait snake that crawled out of the air conditioner has caused widespread concern. However, there is an even more dangerous "killer" that can crawl out of your air conditioner at home.

Legionella: The Deadly Stalker in Your Air Conditioner

Legionella is a bacteria that thrives in warm and humid environments (25-42°C). It spreads through aerosolized water droplets, and when inhaled, it can lead to severe Legionnaires' disease.

It’s a master of disguise; the initial symptoms of a Legionella infection resemble those of the flu (fever, cough), making it easy to misdiagnose!

The disease can progress to severe pneumonia within 48 hours, leading to respiratory failure and multi-organ damage, with a fatality rate as high as 10-30%!

People with weakened immune systems (elderly, smokers, and patients with chronic conditions) are most at risk!

Where Legionella Hides

Legionella is commonly found in air conditioners that haven't been cleaned for a long time, public hot springs, unused showerheads, garden fountains, and humidifiers that haven’t been regularly cleaned, all of which can spread the bacteria into the air.

Be Aware of These Warning Signs

Symptoms can appear 2-10 days after infection and may include: high fever (above 39°C), severe cough, chest pain (even coughing up blood), shortness of breath, and confusion.

Note: Common antibiotics (like penicillin) are ineffective against this disease, and delayed treatment can be fatal!

How to Defend Against Legionella Bacteria

• Clean equipment and water sources: Clean air conditioners regularly. Before using the air conditioner each year, hire a professional to ensure thorough cleaning. Typically, remove the filter every month and wash it with hot water over 70°C and neutral detergent. Pay attention to cleaning water sources, thoroughly cleaning any dirt and sediment in unused taps or showerheads, and flush out any stored water before use. Change water in humidifiers daily and disinfect the water once a week with diluted chlorine-based disinfectant.

• Preventive measures when going out and physical abnormalities: Be cautious when going out, choose areas with good hygiene conditions, and disinfect frequently when using hot springs. Wear a mask and gloves when gardening or handling soil. Be alert to physical abnormalities; if you suddenly develop a high fever, cough, or diarrhea after using air conditioning or taking a bath, seek medical attention immediately and inform your doctor about the situation.