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Published on: 7/23/2025

How do you get infected with brain-eating amoeba?

You can get infected with brain-eating amoeba by swimming in warm freshwater lakes or rivers where the amoeba lives. It enters the body through the nose and travels to the brain.

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Explanation

The brain-eating amoeba, known scientifically as Naegleria fowleri, is found in warm freshwater environments such as lakes and rivers. People can become infected when they swim or dive in these waters, and the amoeba enters the body through the nose. Once inside, it travels to the brain, where it can cause a serious infection called primary amebic meningoencephalitis (PAM).

Here are some key points to remember:

  • Where it lives: The amoeba is typically found in warm freshwater, like lakes, rivers, and hot springs.
  • How it infects: Infection occurs when contaminated water enters the nose. The amoeba then travels to the brain.
  • What it causes: The infection it causes, PAM, is very serious and affects the brain.

It's important to be cautious when swimming in warm freshwater bodies, especially in areas where the amoeba is known to exist. Avoid getting water up your nose, and consider using nose clips or keeping your head above water to reduce the risk of infection.

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