Rare Brain-Eating Amoeba Poses Summer Risk in Israel, Experts Advise Caution

The rare brain-eating amoeba Naegleria fowleri thrives in warm, fresh water environments such as lakes, springs, and reservoirs, posing a rare but serious health risk during the hot Israeli summer. This amoeba can infect people when contaminated water enters the nose, typically during swimming, diving, or jumping into water, potentially causing a severe and often fatal brain infection. Despite its rarity, with only 167 cases recorded in the U.S. since 1962 and a very high mortality rate, awareness and preventive measures are crucial.

Dr. Dana Dror, an infectious disease specialist from Clalit Health Services in Jerusalem, explains that the amoeba flourishes in warm, stagnant, or shallow water, conditions increasingly common due to climate change. Infection does not occur through drinking water but only when water enters the nasal passages. To reduce risk, experts recommend avoiding water entering the nose by using nose clips or avoiding head immersion in warm natural springs. Swimming in supervised, chlorinated pools with regular water quality checks is safer.

Visitors to natural water sites should heed local health advisories and avoid swimming in areas flagged for potential contamination. Early symptoms of infection resemble common viral illnesses, fever, severe headache, nausea, and vomiting, but can rapidly worsen, requiring immediate medical attention if symptoms appear after freshwater exposure. Dr. Dror emphasizes that swimming and water activities remain safe with proper precautions, allowing people to enjoy the summer while minimizing risk.