As an expert in the field of epidemiology, I have a deep understanding of various diseases and their geographical distribution. Valley fever, medically known as coccidioidomycosis, is a disease caused by the inhalation of spores of the fungus *Coccidioides*. This fungus is endemic to certain regions, and its presence can be quite significant in understanding the health risks for individuals living or traveling to those areas.

Valley fever is primarily found in the southwestern United States, particularly in parts of California, Arizona, Nevada, New Mexico, and Texas. The arid and semi-arid climates of these regions create an ideal environment for the *Coccidioides* fungus to thrive. Soil disruption activities such as construction, farming, or even natural events like earthquakes can disturb the soil and release the spores into the air, where they can be inhaled by humans or animals.

In addition to the United States, the *Coccidioides* fungus has also been identified in parts of Mexico, Central America, and South America. The warm and dry conditions prevalent in these areas are conducive to the growth of the fungus. It's important to note that while the disease is less common in these regions compared to the southwestern U.S., travelers and residents should still be aware of the risk.

Interestingly, there have been reports of the fungus being found in south-central Washington State, which is outside the typical range of its distribution. This discovery highlights the potential for the fungus to expand its range due to factors such as climate change, which could alter the environmental conditions that the fungus prefers.

Prevention of Valley fever involves taking precautions when in areas where the fungus is known to exist. This includes wearing protective masks when working in dusty conditions, avoiding outdoor activities during dust storms, and taking steps to reduce dust exposure in homes and workplaces. Early diagnosis and treatment are also crucial to prevent the progression of the disease, which can be severe in some cases.

In summary, the states where Valley fever can be contracted are primarily in the southwestern United States, with additional risk areas in Mexico, Central America, and South America. The presence of the *Coccidioides* fungus in south-central Washington State is a reminder that the range of this disease is not static and can change over time.

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The fungus that causes Valley fever, Coccidioides, is found in the southwestern United States, parts of Mexico and Central America, and parts of South America. The fungus has also been found in south-central Washington State.Aug 11, 2017read more >>