A group of fungi known as Aspergillus, which can be very dangerous, may spread globally, potentially reaching parts of Europe, Asia, and the Americas. Recent studies indicate that climate change, particularly rising temperatures, could push this health threat into regions that have been largely unaffected until now.
What’s happening?
According to a report published by the Financial Times earlier in May, researchers in the UK released a preprint showing that climate change could lead to an increase in the prevalence of this harmful fungus. Essentially, a warming planet could accelerate its growth and distribution.
This threat might sound like something from a post-apocalyptic film. For instance, in the video game and HBO adaptation of “The Last of Us,” a brain-infecting fungus decimates the population. Interestingly, that narrative involves a different type of fungus called Ophiocordyceps, which specifically targets the brains of certain insects and animals, not humans.
Thankfully, no Ophiocordyceps species infects humans, but Aspergillus is a genuine concern that can affect people globally. Its spores can cause aspergillosis, which primarily impacts the lungs but can also have effects on the brain. When infections occur, the mortality rates can be significant.
“We’re talking about hundreds of thousands of lives, and the geographical distribution of species is about to change,” said Norman van Rhijn, a co-author from the University of Manchester, in a discussion with the Financial Times. “In 50 years, the landscape of infections will look completely different.”
Why are increasing fungal threats concerning?
Pathogenic fungi like Aspergillus thrive in warm and humid conditions. With the planet’s continuous warming and sea level rise—largely from the use of fossil fuels—the perfect storm is brewing for these infections to spread into new areas.
Scientists have been voicing concerns over possible global health crises due to a surge in fungal pathogens. Though these organisms are tiny, unchecked fungi can significantly impact health and safety, particularly for individuals with weakened immune systems or existing health issues.
Moreover, warm temperatures and increased moisture foster fungal growth, but extreme weather events also play a role. For example, wildfires can disturb soil habitats, sending spores airborne in smoke. After droughts, when heavy rains follow, spores can be released into the air, affecting nearby communities.
Additionally, rising infection rates can lead to drug resistance, leaving vulnerable populations in an even more precarious situation. A recent CNN report highlighted that the World Health Organization added Aspergillus flavus to its list of critical fungal pathogens in 2022 due to its impact on public health and existing resistance to antifungal treatments.
This particular strain isn’t just a health issue; it can also harm crops, which puts food supplies at risk.
What can be done to prevent and prepare for fungal threats?
Researchers are attempting to better understand fungal pathogens with initiatives like a multi-year project at the University of California, Berkeley, aiming to identify factors that influence the severity and occurrence of these infections. Efforts are also underway to minimize their spread and secure food supplies.
The WHO released a report in April, underscoring the need for quicker, more reliable, and affordable testing methods, particularly in low- to middle-income countries where these fungal threats are especially problematic. Promoting environmental policies that invest in research while also prioritizing marginalized groups affected by fungal infections is crucial for finding effective solutions.
In residential areas, using natural fungicides might help manage fungal spread. On an individual level, practicing good hygiene, ensuring proper skin drying, and strengthening one’s immune system can mitigate some risks. However, to combat Aspergillus and other fungi that may pose global threats, comprehensive health solutions—including efforts to counteract human-driven climate change—will be essential.
