The organism is commonly called the “brain-eating amoeba” because it causes a brain infection — primary amebic meningoencephalitis (PAM) — when water containing the amoeba goes up the nose. DPH noted the amoebae cannot infect people if it is swallowed and the infection is not spread from person to person. Only about three people in the United States get infected each year, but infections are usually fatal.
A 2-year-old boy died last week in Nevada from a brain infection caused by the same amoeba. Nevada’s Division of Public and Behavioral Health said it believes the boy was exposed at Ash Springs, a natural hot spring located in Lincoln County. In February, a man in Florida died after becoming infected through sinus rinsing, according to the Centers for Disease Control and Prevention.
Georgia public health officials would not disclose details of where the Georgia victim was exposed. DPH spokeswoman Nancy Nydam said in an e-mail, “If we say it was in a specific body of water, it may not be there today. Additionally, we run the risk of giving a false sense of security that it is only that particular body of water, when it could be anywhere.”
The signs of a Naegleria fowleri infection usually begin with severe headache, fever, nausea and vomiting and progresses to stiff neck, seizures, and coma. Symptoms usually begin about five days after infection but can start anytime within 1 to 12 days. Once symptoms start, the disease progresses rapidly and usually causes death within about five days.
The CDC says Naegleria fowleri infections are rare, with about three cases every year in the U.S. There were 157 cases reported between 1962 and 2022. Only four people have survived, according to the CDC.
Credit: Andrew Davis Tucker
Credit: Andrew Davis Tucker
Dennis Kyle, director of the University of Georgia’s Kyle Lab, which focuses on the development of anti-parasitic drugs, said Naegleria fowleri is so deadly because symptoms of the infection resemble those of viral meningitis, a much more common and more treatable disease. While current drugs to treat this brain infection are not very effective, delays in diagnosis often means it’s too late for the person “to even have a chance” of surviving, he said. His lab is working on a tool to speed the diagnosis so patients can start treatment as soon as possible.
While the risk of infection is low, the risk rises with summertime temperatures as more people turn to lakes and ponds to cool off.
Prior to this newly confirmed case, there have been five other cases reported in Georgia since 1962. According to a report in The Atlanta Journal-Constitution in 2002, an 11-year-old Middle Georgia boy died of encephalitis after ingesting the amoeba. He was hospitalized on Aug. 29, 2002 with a headache, fever and vomiting. He died at a Savannah hospital, nine days after he went in the Oconee River during a birthday party. Doctors in Savannah concluded he ingested Naegleria fowleri.
The amoebae are naturally occurring and there are no routine environmental tests available for Naegleria fowleri in bodies of water. Because it is very common in the environment, levels of the amoebae that naturally occur cannot be controlled. The location and number of amoebae in the water can vary over time within the same body of water.
Though the risk of infection is low, DPH said those swimming in recreational water should always assume there is a risk when they enter warm fresh water. DPH said the swimmer can reduce the risk by limiting the amount of water that goes up the nose.
The CDC recommends the following precautions:
• Avoid jumping or diving into bodies of warm freshwater, especially during the summer.
• Hold your nose shut, use nose clips, or keep your head above water when in bodies of warm fresh water.
• Avoid putting your head under water in hot springs and other untreated geothermal waters.
• Avoid digging in, or stirring up, the sediment in shallow, warm fresh water. The amoebae are more likely to live in sediment at the bottom of lakes, ponds, and rivers.