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Primary amoebic meningoencephalitis in North Queensland: the paediatric experience
Claire L Nicholls1, Fiona Parsonson2, Lawrence Ek Gray2
1Townsville Hospital, Townsville, QLD clairenicholls82@gmail.com.
Abstract:
Primary amoebic meningoencephalitis (PAM) is a fulminant, diffuse haemorrhagic meningoencephalitis caused by Naegleria fowleri, with an almost invariably fatal outcome. In Australia and the developed world, PAM remains a rare disease, although it is very likely that large numbers of cases go undetected in developing countries. N. fowleri is a thermophilic, free-living amoeba with a worldwide distribution. It is acquired when contaminated fresh water is flushed into the nose and penetrates the central nervous system via the cribriform plate. Clinical features are similar to those of bacterial meningitis, but it does not respond to standard therapy and rapid progression to death occurs in most cases. Some survivors have been reported; these patients received early treatment with amphotericin B in combination with a variety of other medications. Our review describes the local and worldwide experience of this disease and its clinical features, and discusses the associated diagnostic challenges. We hope that by detailing the local response to a recent case, and the outcomes of our public health campaign, we can improve the knowledge of this rare disease for doctors working in rural and remote Australia.
Insights
Primary amoebic meningoencephalitis (PAM), a rare and fatal brain infection caused by Naegleria fowleri, requires prompt diagnosis and treatment. Early amphotericin B therapy offers a chance of survival for this devastating infection.
Area of Science:
- Neurology
- Infectious Diseases
- Public Health
Background:
- Primary amoebic meningoencephalitis (PAM) is a rare but almost invariably fatal infection of the central nervous system.
- The causative agent, Naegleria fowleri, is a thermophilic free-living amoeba found worldwide.
- Infection occurs through nasal inoculation of contaminated freshwater, leading to rapid neurological deterioration.
Purpose of the Study:
- To review the global and local experience of Primary amoebic meningoencephalitis (PAM).
- To discuss the clinical features and diagnostic challenges associated with Naegleria fowleri infections.
- To share insights from a recent case and public health campaign to improve physician awareness, particularly in remote Australia.
Main Methods:
- Literature review of worldwide and local PAM cases.
- Analysis of clinical presentations and diagnostic difficulties.
- Case study of a recent PAM infection and its management.
- Evaluation of a public health campaign aimed at healthcare professionals.
Main Results:
- PAM is characterized by rapid progression and high mortality, often mimicking bacterial meningitis.
- Early treatment with amphotericin B, alongside other medications, has been associated with survival in rare cases.
- Diagnostic challenges persist, highlighting the need for increased awareness.
- Public health initiatives can improve knowledge and preparedness for rare diseases like PAM.
Conclusions:
- Naegleria fowleri infections pose a significant diagnostic and therapeutic challenge due to their rarity and severity.
- Enhanced physician education and early, aggressive treatment are crucial for improving outcomes in Primary amoebic meningoencephalitis.
- Public health strategies are vital for disseminating knowledge about rare, life-threatening infections, especially in resource-limited or remote settings.
