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2020, Number 3

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Rev Cubana Med Trop 2020; 72 (3)

Free-living amoeba encephalitis: current tools for early diagnosis and treatment

Mendiola MJ, Fresco SY, Rodríguez OM

Language: Spanish
References: 60
Page: 1-22
PDF size: 391.31 Kb.


ABSTRACT

Introduction: Naegleria fowleri, Acanthamoeba spp. and Balamuthia mandrillaris are free-living amoebae of infrequent premortem diagnosis which cause substantial damage to the central nervous system.
Objective: To provide an overview of the clinical-epidemiological aspects and the most effective diagnostic possibilities in primary amebic meningoencephalitis and granulomatous amebic encephalitis, as well as their treatment experiences in recent publications.
Methods: A bibliographic review was conducted about free-living amoebae. An analysis was performed of data obtained from scientific papers published in the databases Google Scholar and PubMed, and the citations listed by the PubMed Central program.
Data analysis and synthesis: As principal term of the analysis of primary amebic meningoencephalitis and amebic granulomatous encephalitis, the differentiation of their clinical and epidemiological characteristics stands out, also that cerebrospinal fluid is highly relevant for the diagnosis of primary amebic meningoencephalitis. However, for presumptive cases of amoebic granulomatous encephalitis, the examination of cerebrospinal fluid depends on the risk-benefit assessment and greater positivity has been obtained with the histopathological diagnosis of premortem biopsies. In general, the implementation of DNA research by different methods provided accurate information about each one of the free-living amoeba species that cause neurological disease. Confirmatory culture isolation of N. fowleri, Acanthamoeba spp. and B. mandrillaris revealed growth feasibility differences between diverse media depending on the species and additional limitations.
Conclusions: Mortality associated to central nervous system infections caused by free-living amoebae remains high. Studies describing cases of patients who have survived constitute useful material. It is important to bear in mind that fast diagnosis of the disease is crucial to treatment success.


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