First Case of Equine West Nile Virus Confirmed in Weld County
State officials are urging caution as they confirm the first case of equine West Nile virus of 2023 in a horse in Weld County. The horse, a gelding, had to be euthanized after showing sudden neurological symptoms such as weakness, stumbling, and recumbency.
The state health department made the announcement on Friday, just a day after Weld County officials revealed that they were investigating the county’s first potential human case of West Nile virus this year. Details about the patient’s condition have not been disclosed.
It is important to note that West Nile virus affects both humans and animals. The first human case in the state was confirmed in La Plata County on July 24. Mosquito pools in several counties, including Arapahoe, Boulder, Delta, Denver, Larimer, Pueblo, and Weld counties, have tested positive for the virus this summer.
Weld County has reported positive mosquito tests from all three monitored zones in the county. It, along with Larimer and Boulder counties, has seen particularly high levels of mosquito activity. Experts believe that heavy snowpack, a wet spring, and warmer temperatures have contributed to the increase in mosquito activity.
Colorado State Veterinarian Maggie Baldwin emphasized the importance of vaccinations in preventing the virus from spreading. She urged horse owners to work closely with their veterinarians to determine the appropriate vaccination schedule for their animals.
West Nile virus cycles between wild birds and mosquitoes and can affect various species, including humans and horses. In horses, clinical symptoms can include weight loss, depression, muscle weakness or paralysis, teeth grinding, aimless wandering, convulsions, and circling.
While most people infected with West Nile virus do not show any symptoms, some may experience fever, headache, rash, nausea, and muscle aches. In rare cases, less than 1% of patients can develop a serious illness that affects the nervous system and can be fatal. It is important for anyone experiencing symptoms to seek immediate medical attention.
Currently, there is no vaccine or medicine available to treat West Nile virus in humans. However, vaccines are a safe and effective prevention tool for horses. Horses that have not been vaccinated require a two-shot vaccination series, while those that have been vaccinated require an annual booster.
Both horse owners and residents are strongly encouraged to take measures to reduce mosquito populations and potential breeding areas. This includes removing stagnant water sources, using mosquito repellents, and avoiding outdoor activities during mosquitoes’ feeding times, usually in the early morning and evening.
The state advises that any time a horse displays signs of neurological disease, a complete veterinary examination should be conducted. All infectious or contagious equine neurologic diseases must be reported to the Colorado State Veterinarian’s Office.
As the West Nile virus continues to circulate in Colorado, it is crucial for the public to stay informed and take necessary precautions to protect themselves and their animals.