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Climate Change Gives Rise to Fungal Disease in California

California is facing a new and unexpected threat brought about by the changing climate, according to reporting done by The Hill. A rapidly spreading fungus, coccidioides, has been causing a surge in cases of a disease known as coccidioidomycosis, or more commonly, “Valley fever.” Unlike traditional contagious diseases, Valley fever is contracted through the inhalation of fungal spores, and it is climate change that is facilitating their proliferation in new areas, posing a significant challenge to the health and well-being of Californians.

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Typically confined to California’s lower San Joaquin Valley and parts of Arizona, Valley fever is now expanding its reach northwards, beyond its traditional boundaries. According to a report from California’s Office of Environmental Health Hazard Assessment (OEHHA), the presence of Valley fever has risen dramatically over the past two decades. The annual incidence of reported cases has surged from 4.3 per 100,000 people in 2001 to 20.6 per 100,000 people in 2021.

Epidemiologists and researchers have identified the changing climate as a key driver behind this alarming trend. Jennifer Head, an epidemiologist at the University of California, Berkeley School of Public Health, explains that as temperatures rise and areas become drier due to Climate change, conditions have become favorable for the dispersion of coccidioides spores. These spores are known to cause Valley fever when inhaled by individuals, leading to a range of symptoms including flu-like illness that can persist for weeks or months.

Two species of soil-dwelling coccidioides are responsible for causing Valley fever. One species primarily affects California, while the other is found in Arizona and other parts of the Southwestern U.S., as well as Central and South America. The term “Valley” in Valley fever refers to California’s Central Valley, but cases have been detected in adjacent counties and even in more northern regions over the last decade.

The impacts of Valley fever are not evenly distributed among the population. Workers who spend significant time outdoors and interact with soil, such as farmers, field workers, and construction crews, are at higher risk of exposure. Moreover, Hispanic and Latino communities have been disproportionately affected, constituting 47.4% of cases despite representing only 37.3% of California’s total population. Other vulnerable groups include individuals of Black or Filipino background, pregnant individuals, older adults, and those with weakened immune systems.

The interplay between drought and rain plays a crucial role in the proliferation of coccidioides. During drought periods, coccidioides spores can become dormant and lie deep within the soil. However, when rain returns, the fungus becomes active and abundant, leading to its dispersal. Researchers have found that drought conditions exacerbate the transmission of coccidioides, resulting in increased cases of Valley fever during wet years following a drought.

Climate change-driven factors, including increased wind and wildfires, also contribute to the spread of coccidioides spores. The changing climate is predicted to extend the Valley fever season, leaving residents and visitors in endemic areas vulnerable to infection for longer periods. As the disease spreads northward, a challenge arises in terms of recognition and treatment. Physicians outside of California may be less familiar with Valley fever, potentially leading to delayed or misdiagnosed cases.

Valley fever is not an isolated case; it represents a broader pattern of climate change-induced diseases on the rise. Mosquito-borne illnesses like malaria and Dengue fever are finding new territories due to changing climates. This phenomenon underscores the need for global cooperation in addressing the impacts of Climate change on health.

Efforts to combat Valley fever include investigating potential vaccines and developing antifungal treatments. However, experts believe that antifungal development is critical, as effective antifungals against coccidioides are currently lacking. While the challenges posed by Valley fever are significant, they underscore the urgency of addressing Climate change and its multifaceted impacts on human health.

As the threat of Valley fever continues to expand, it is clear that comprehensive solutions must be sought. From mitigating Climate change to developing effective treatments and raising awareness among healthcare providers, the fight against Valley fever is emblematic of the broader battle to safeguard human health in a changing world.

Sign this petition to help prisoners being affected by Valley Fever.