Salt Lake City

Cache County Reports Two New West Nile Virus Cases as Utah's Total Rises to Three

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Published on August 15, 2025
Cache County Reports Two New West Nile Virus Cases as Utah's Total Rises to ThreeSource: NIAID, CC BY 2.0, via Wikimedia Commons

As Utah grapples with the rising threat of the West Nile virus, health officials in Cache County have confirmed two new human cases. This development, reported by KSLTV, follows closely on the heels of another case identified in Salt Lake County, bringing the total number of statewide cases to three. The Bear River Health Department highlighted the means of transmission, explaining, "West Nile virus spreads to humans and animals from bites of infected mosquitoes. Symptoms of WNV include fever, headache, rash, vomiting, body aches, and diarrhea. In rare cases, it can lead to neurological problems," as per KSLTV.

Notably, the rate of mosquito pools testing positive for the virus is on the rise. KSL.com detailed that the current positivity rate of 1.53% exceeds figures from the past two years. In 2024, this number was 1.41%, and 0.99% in 2023. Last year saw 14 reported cases, with the majority presenting as the more severe neuroinvasive form, and one Utahn succumbed to the illness.

Following suit, ABC4 noted the severity of the virus, reporting that roughly 1 in 150 infected individuals will face grave illnesses like encephalitis or meningitis. This is particularly alarming for older adults and those with compromised immune systems, who are at a heightened risk. The danger is significant, with about 1 in 10 people with severe cases resulting in death. The CDC advocates for bite prevention as the best defense, with no specific treatment or vaccine currently available for West Nile Virus.