AUG 22, 2016 11:21 AM PDT

Diagnosed: Fourth Patient Infected with Brain-Eating Amoeba

Summer is prime time for activities on the river. But a swim in the river turned into a life-threatening event for a Florida patient, who was infected with a brain-eating amoeba from the river. This marks the fourth case of the year with foreboding statistics, as all three previous cases have been fatal. However, doctors are optimistic that timely diagnosis and administration of an anti-parasitic drug could make the difference for the current Florida patient.

How a tiny amoeba can destroy the brain | Image: wikimedia
Swimming in the warm freshwaters of lakes and rivers are single-celled organisms of the species Naegleria fowleri. These amoebas are microscopic and imperceptible to the human eye. In infected waters, the amoeba swims up the person’s nose and make its home in the brain, where it starts to destroy brain tissue. Of note, you can’t get infected by swallowing water with the amoeba.

"We believe that the individual contracted the infection after swimming in unsanitary water on a single private property," said Mara Gambineri, the communications director for Florida Department of Health. She notes that this is an isolated incident that poses no risks to the general public.

Symptoms of the infection typically begin within a few days up to around a week. Often mistaken for meningitis, the symptoms include fever, nausea, vomiting. However, as more brain tissues are destroyed, the patient will suffer from seizures and hallucinations.

Unfortunately, primary amebic meningoencephalitis is usually fatal; patients usually die within 3 weeks of the diagnosis. Of the 138 cases of N. fowleri infections between 1962 and 2015, only three people have survived – a fatality rate of 97.8 percent.

But, three people did survive, and from one such case in 2013, the treatment plan has been adopted into a treatment regimen for N. fowleri infections. Known as the Hardig protocol for Kali Hardig, the 12-year-old who contracted the amoeba, doctors prescribed a combination of anti-fungal medications and an experimental drug called miltefosine (Impavido). In addition, they also induced a coma and lowered her body temperature while the drugs were taking effect.

Doctors hope the success of this case will also carry forward for the current Florida patient, who has already been promptly treated with miltefosine. "This is the most optimistic, cautiously optimistic, I've been so far as compared to other cases because of how fast [the patient was] diagnosed and how quickly treated in combination with other drugs," said Todd MacLaughlan, CEO of Profounda, the makers of miltefosine.

It is important to reiterate that cases of the brain-eating amoeba are very rare. The CDC estimates 4 to 8 cases of N. fowleri infections per year. By comparison, the CDC reports an average of 3,536 drownings annually (about 10 deaths per day). Still, even with a low risk for infections, health experts caution to prevent water entering the nose when swimming.

Additional sources: CNN news
About the Author
  • I am a human geneticist, passionate about telling stories to make science more engaging and approachable. Find more of my writing at the Hopkins BioMedical Odyssey blog and at
You May Also Like
NOV 09, 2018
Cannabis Sciences
NOV 09, 2018
Cannabidiol Enhances Fracture Healing
The Journal of Bone and Mineral Research published a study showing that the cannabinoid cannabidiol (CBD) strengthens bones and accelerates the healing of...
JUN 11, 2018
Clinical & Molecular DX
JUN 11, 2018
Nasal Brush Test for Asthma Diagnosis
Diagnosing mild-to-moderate asthma can be difficult to diagnose, especially when scientists need to rule out other respiratory disorders that have similar...
JUL 01, 2018
JUL 01, 2018
Growing Patient Cells on a Chip for Personalized Drug Screens
This work could help eliminate animal models, and tailor medicine to the patient....
OCT 21, 2018
Genetics & Genomics
OCT 21, 2018
The Genetic Cause of Severe Childhood Epilepsy is Revealed
This work has opened up new therapeutic avenues that the scientists will be exploring....
OCT 29, 2018
OCT 29, 2018
Immunity for All
A study published in Nature has shed light on the evolution of immune system genes across species with great detail at the single-cell level...
NOV 17, 2018
NOV 17, 2018
Tobacco Smoke Associated With Increased Risk Of Diabetes
There are a number of risk factors for heart disease. Many of them are within our control such as a healthy diet and being physically active. Others we can...
Loading Comments...