New Study Highlights Threat of Invasive Mold Infections

NEW YORK — A recent study conducted in the U.S. reveals that invasive mold infections may be more dangerous than previously acknowledged, potentially posing a deadly risk.

Over a span of five years, researchers found about 450 cases in hospitals around Atlanta, with roughly one-third of those patients not surviving their hospital stays.

This research, released this week by the Centers for Disease Control and Prevention, aims to provide a clearer picture of how prevalent these infections are; notably, there’s no requirement for doctors to report such cases.

Dr. Jeremy Gold from the CDC, who led the study, mentioned that this marks the first time such estimates have been published.

Dr. Gold emphasized the importance of recognizing this issue now, particularly as climate change-related events like hurricanes and floods may increase exposure to mold.

Dr. Jeffrey Jenks, an infectious disease expert at Duke University, echoed this concern, stating that the frequency of these fungal infections will likely rise due to climate change. Moreover, the aging population makes it a critical concern since older individuals tend to be more vulnerable to these kinds of illnesses.

Invasive mold diseases are relatively rare and can stem from various mold species. Most infections occur when someone inhales mold spores, though they can also enter through cuts or contaminated medical equipment.

While most people don’t experience health issues from mold spores, certain groups—like the elderly or those with weakened immune systems—can find them life-threatening.

Previously, CDC research estimated that over 15,000 hospitalizations in the U.S. annually are related to invasive mold diseases.

To gain insights into the local incidence of these infections, the research team collaborated with four hospitals and their outpatient clinics in the Atlanta area, reviewing potential cases from 2020 to 2024. They initially identified nearly 1,000 cases but narrowed it down to about 450 after filtering out instances not meeting the criteria for invasive mold disease.

The researchers anticipate that hospitals might encounter 3 to 5 cases each year for every 100 inpatient beds, with higher rates observed in larger academic facilities that handle more complex cases.

Significantly, many of the patients had compromised immune systems or had recently recovered from COVID-19. Although mold exposure can take place in healthcare settings, the study did not pinpoint where each patient was initially exposed.

Dr. Gold acknowledged that translating these findings from the Atlanta area to other regions is challenging, as mold issues can vary significantly across the country. However, he suggested that this information could help hospital administrators gauge whether their case numbers align with expectations or indicate an outbreak.

Jenks described the study’s results as “valuable” but noted the need for similar studies in other parts of the U.S. for a more comprehensive understanding.