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Scientists Map Naegleria fowleri Nose-to-Brain Route
Scientists map how Naegleria fowleri amoebae move from the nose to the brain, using N. gruberi as a proxy. The finding is in the news due to its linkage with Primary Amoebic Meningoencephalitis (PAM) caused by Naegleria fowleri.
Naegleria fowleri and Primary Amoebic Meningoencephalitis:
| Dimension | Key Details |
|---|---|
| Common name and nature | Naegleria fowleri is commonly known as “brain-eating amoeba” and is a single-cell organism. |
| Habitat | It thrives in warm freshwater lakes, ponds, and rivers, and can also survive in poorly maintained swimming pools in rare cases. |
| Human-infecting species | Only one species of Naegleria, Naegleria fowleri, infects people. |
| Disease caused | It causes Primary amoebic meningoencephalitis (PAM). |
| Infection acquisition route | It is typically acquired through the nasal passage and mouth when a person goes swimming and diving. |
| Nose-to-brain pathway | The amoeba migrates through the olfactory nerve to the brain, where it causes severe inflammation and destruction of brain tissue. |
| Transmission characteristics | The infection does not spread from person to person, and does not manifest symptoms when contracted in other forms. |
| Association with environment and season | The infection is primarily associated with a warm freshwater environment, especially during hot summer months when water temperatures are higher. |
| Non-communicable and drinking water | PAM is non-communicable, and people cannot get infected with Naegleria fowleri from drinking water contaminated with the amoeba. |
| Symptoms | Symptoms include headache, fever, nausea, and vomiting; later, the patient may have a stiff neck, confusion, seizures, hallucinations, and coma. |
| Fatality timeline | Most people with PAM die within 1 to 18 days after symptoms begin, and it usually leads to coma and death after 5 days. |
| Treatment status | There are no effective treatments for the disease yet. |
| Drugs used in current management | Doctors treat it with a combination of drugs: amphotericin B, azithromycin, fluconazole, rifampin, miltefosine, and dexamethasone. |