Case report links fatal amebic meningoencephalitis to nasal irrigation with RV tap water

A field report describes a single case of fatal primary amebic meningoencephalitis in a person who reportedly used tap water from a recreational vehicle for nasal irrigation. No comparator group was reported, and the study design was a case report. The outcome was fatal, with 1 case and 1 death reported. No effect size, p-values, or confidence intervals were provided.

Safety data were limited, with the serious adverse event being the fatal primary amebic meningoencephalitis itself. Other adverse events, discontinuations, and tolerability were not reported. The report notes an association but does not establish causality.

Key limitations include the nature of the evidence as a single case report, which cannot establish causation or quantify risk. Generalizability is extremely limited. Funding and conflicts of interest were not reported. The practice relevance is not specified, but this report serves as a reminder of the potential, though unquantified, risk associated with using non-sterile water for nasal irrigation.