Naegleria fowleri

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Naegleria fowleri


Human and animal

Transmission/Exposure Routes

Naegleria fowleri infects people by entering the body through the nose.[1] Person-to-person transmission is very rare.

Incubation Times

1-7 days[1]

Case Fatality Ratios

In the summer of 2007, 6 fatal cases of infection occurred in the United States, all young males[2]

Burden of Disease

The risk of Naegleria fowleri infection is very low. There have been 32 reported infections in the U.S. in the 10 years from 2001 to 2010.[1]

Duration of Infectiousness and disease



Asymptomatic Rates

Excretion Rates (see Exposure)



A microscopic ameba (single-celled living organism) that can cause a very rare, but severe, infection of the brain. Only one species (type) of Naegleria infects people: Naegleria fowleri.[1]

Recommended Dose Response Model

Dose response models for Naegleria
Exponential, k is 3.42E-07
Exponential model.png


  1. 1.0 1.1 1.2 1.3 CDC
  2. Medscape