Detections of a rare fungus that can trigger fatal brain infections have surged fourfold in the United States over recent years, according to research by the University of Washington and the CDC. The fungus Cladophialophora bantiana primarily targets the central nervous system and can form brain abscesses.
Rising detections and high fatality rate
Infections prove lethal in 60% to 70% of cases, even when patients undergo intensive treatment. The study, published in the Morbidity and Mortality Weekly Report, documented a fourfold rise in detections from 2023 to 2025. The cause behind this increase remains unknown, with climate change proposed as a potential contributing factor, reports the Mirror.
Despite the documented surge, there is presently no US government monitoring of infections caused by this fungus. Both immunocompromised patients and otherwise healthy people can be impacted. The risk outlined in the research isn't limited to those with already weakened immune systems.
How infection establishes itself
Cladophialophora bantiana is a mould thought to be acquired through inhalation. Most of the infections detailed in the study were discovered in brain tissue, reflecting the fungus's propensity to impact the central nervous system. The brain abscesses it can trigger are central to the infection's severity.
The reported fatality rate of 60% to 70% emphasises how perilous it can be, even with attempts to treat it aggressively. Researchers stressed the necessity for enhanced clinical awareness. Their findings propose surgical removal alongside antifungal therapy as potential treatment options for these infections. These approaches are presented as possible treatments, not a guarantee of recovery, given the high mortality reported despite treatment.
Could global warming play a role?
The potential role of global warming remains unclear. Warming conditions may facilitate the spread and adaptation of fungal pathogens, offering one possible explanation for the increase. However, the cause of the rise in detections has not been established.
The research combines two concerns: an increase in detections of a rare pathogen and the severe consequences for those who develop an infection. The fourfold figure shows the change recorded over the two-year period, while the fatality figures indicate the severity of the disease. With no federal tracking currently in place, the study's reported increase has prompted calls for heightened clinical vigilance.
