URGENT UPDATE: The first confirmed case of West Nile virus in La Plata County, Colorado, has been reported as of early July 2025. The patient has since recovered at home, according to La Plata County Public Health Department (LPCPHD) Director Theresa Anselmo.
This alarming development has prompted health officials to launch a thorough investigation to trace the source of exposure. West Nile virus cases are uncommon in La Plata County, with only one case reported last year, which resulted in hospitalization. In stark contrast, 11 cases have already been reported across Colorado this year, including counties such as Adams, Boulder, Pueblo, and Weld. Tragically, a resident from Lafayette became the first fatality from the virus in the state on July 25.
As of now, three patients have been hospitalized, and five have displayed serious neurological symptoms. Anselmo emphasizes that 8 out of 10 individuals infected with the West Nile virus may not show any symptoms at all. “Severe illnesses are more likely to occur in older adults and those with pre-existing conditions,” she warned, referring to higher-risk groups like those with cancer, diabetes, or compromised immune systems.
Symptoms of West Nile virus can manifest between two to 14 days post-infection and often include fever, headache, body aches, and rash. Severe symptoms, although rare, can escalate to high fever, disorientation, and even paralysis. Although no vaccine exists, patients can receive supportive care.
The LPCPHD urges residents to take preventive measures against mosquito bites, the virus’s primary transmission method. Anselmo recommends using EPA-registered insect repellents, wearing long-sleeve clothing during peak mosquito hours, and eliminating standing water to reduce mosquito breeding grounds.
“While humans are ‘dead-end hosts’ for the virus, meaning they cannot transmit it to others, the risks are still significant,” Anselmo stated. Mosquito prevention is critical, especially in light of the increasing number of cases reported this year.
Since its arrival in the U.S. in 1999, West Nile virus has caused widespread outbreaks, peaking in 2002 with over 4,156 cases and 284 deaths nationwide. The Centers for Disease Control and Prevention (CDC) recorded 1,791 cases and 164 deaths last year alone.
As health officials continue to monitor the situation, residents are advised to remain vigilant and report any unusual symptoms following mosquito bites. The situation is developing, and further updates will be provided as more information becomes available.