Imagine a warm, lazy lake in August—the kind where the water feels like a lukewarm bath. That’s this amoeba’s happy place: freshwater like lakes, rivers, hot springs, and poorly maintained swimming holes. It thrives in temperatures above 80°F, which is why it’s more common in southern states during summer.
Here’s the weird part: it doesn’t hunt you down. You have to deliberately snort water up your nose—think cannonball fails or diving into murky shallows. It crawls up your nasal cavity to the brain, and that is where the trouble starts. But again, this is incredibly rare—only a handful of cases happen each year in the U.S.
Can chlorine kill it? Yes, but with a catch.
Your backyard inflatable pool? If you’re not checking the chlorine levels, it’s basically a warm petri dish. A properly chlorinated pool—one that smells like a laundry aisle—will kill the amoeba in minutes. But a pool that’s low on chlorine, or one that hasn’t been cleaned in a week, is a different story.
Ever left a glass of tap water out for a day? It doesn’t suddenly become dangerous. But fill a kiddie pool on a hot day and forget to add a chlorine tablet, and that party becomes unwelcoming. The amoeba loves warm, stagnant, and poorly treated water.
