Colorado health officials say the West Nile virus is spreading in Colorado.
More mosquitoes infected with the West Nile virus are turning up in Longmont.
One city in Northern Colorado has launched a late-season attack on the West Nile Virus.
The nationwide outbreak of West Nile virus has prompted Fort Collins to do a second round of mosquito spraying.
The Colorado Department of Agriculture says two cases of West Nile virus have been diagnosed in horses in Fremont and Weld counties, representing the first cases of the disease reported in horses in the state this year.
The West Nile Virus has been detected in four Colorado counties.
Mosquitoes infected with the West Nile virus have been found in three Colorado counties.
Find out which ones they are and how best to keep them out!
Health officials are warning people to take precautions after mosquitoes tested positive for West Nile virus in southeastern Colorado.
Mosquitoes have tested positive for West Nile Virus in Boulder County.