Scientists are raising concerns as dangerous brain-eating amoebas, once confined to warm freshwater regions, are now spreading globally. The amoeba, known as Naegleria fowleri, causes a rare but deadly infection called primary amebic meningoencephalitis (PAM), which destroys brain tissue and is almost always fatal.
Rising Incidence Linked to Climate Change
Research indicates that rising global temperatures are expanding the habitat of Naegleria fowleri. Historically found in warm freshwater lakes and rivers in southern US states, the amoeba has now been detected in northern states and other countries, including parts of Europe and Asia. This shift is attributed to warmer water temperatures that favor the amoeba's growth.
Recent Cases Highlight the Threat
In the United States, cases have been reported from Minnesota, Indiana, and Maryland, far from the traditional southern hot spots. Globally, infections have occurred in Pakistan, India, and Australia. Most cases are linked to swimming or diving in warm freshwater, but infections from tap water used for nasal rinsing have also been documented.
The Centers for Disease Control and Prevention (CDC) reports that from 2013 to 2022, 29 cases were reported in the US, with a survival rate of less than 5%. Early symptoms include fever, headache, and nausea, progressing to stiff neck, seizures, and coma within days.
Prevention and Awareness
Public health officials emphasize preventive measures: avoid swimming in warm freshwater during high temperatures, use sterile or boiled water for nasal rinsing, and install proper water treatment systems. There is no vaccine, and treatment relies on experimental drugs like miltefosine.
Scientists urge increased surveillance and public awareness as climate change continues to alter ecosystems, potentially leading to more frequent encounters with this deadly pathogen.
