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Bacterial Meningitis

Bacterial meningitis is a severe infectious disease involving inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. It occurs when pathogenic bacteria cross the blood–brain barrier and enter the cerebrospinal fluid. Common causative organisms include Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b, Listeria monocytogenes, and Escherichia coli K1. The exact route of entry varies by pathogen and host condition.Routes of Entry...
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[NAEGLERIA FOWLERI AMOEBA MENINGITIS - REVIEW AND UPDATE].

Lior Edelman1, Milena Tocut2, Gisele Zandman-Goddard2

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Naegleria fowleri, a brain-eating amoeba, causes deadly primary meningoencephalitis (PAM) after nasal water aspiration. This thermophilic organism thrives in warm freshwater, posing a risk globally.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Environmental Health

Background:

  • Naegleria fowleri is an amphizoic, thermophilic, flagellate amoeba, commonly known as the brain-eating amoeba.
  • This organism thrives in warm freshwater environments and can survive in soil and the human central nervous system.
  • Naegleria fowleri causes primary meningoencephalitis (PAM), a fatal infection, typically following the aspiration of contaminated freshwater into the nostrils.

Purpose of the Study:

  • To provide a comprehensive overview of Naegleria fowleri.
  • To highlight the epidemiology and pathology of primary meningoencephalitis (PAM).
  • To discuss the global distribution and risk factors associated with Naegleria fowleri infections.

Main Methods:

  • Literature review of existing studies on Naegleria fowleri.
  • Analysis of case reports and epidemiological data.
  • Synthesis of information on the organism's biology, transmission, and clinical manifestations.

Main Results:

  • Naegleria fowleri infections, though rare, are almost invariably fatal.
  • PAM predominantly affects children and young adults, often linked to recreational water activities.
  • The infection occurs globally, with a notable presence in developing countries and sporadic cases in developed nations.

Conclusions:

  • Naegleria fowleri represents a significant public health threat, particularly in regions with warm climates and accessible freshwater bodies.
  • Increased awareness and preventative measures are crucial to mitigate the risk of PAM.
  • Further research into treatment strategies and environmental surveillance is warranted.