According to the CDC (Centers for Disease Control and Prevention), this year, 2012, will be the worst for infections of West Nile Virus. A total of 47 states have reported 1118 human cases. Mosquitoes transmit the disease through their bites to both humans and animals.
The mayor of Dallas, Texas has declared a state of emergency and instituted aerial spraying of mosquitoes. There have been 5 equine West Nile Virus reports in Colorado. There is a vaccine available for horses. Consult with your veterinarian about using the vaccine and treatment if the virus is already present in your horse.
Dogs and cats can be infected with the virus, but there is no evidence of transmission to humans through infected pets, even with dog or cat bites.
Most mosquitoes are active from dusk to dawn, so try to avoid being outdoors at those times. Avoid areas that are wooded, bushy, have standing water. Clear any standing water from your property. Dress appropriately when outdoors in the dusk to dawn times, cover up as much as possible. Use an insect repellent as directed on exposed body parts. DO NOT use insect repellents for humans on your pets. Ask your vet which products are safe to use for your cat or dog.
Make your house as mosquito-proof as possible by mending or replacing any broken screens, keeping doors closed and windows closed where possible.
Hopefully, by following a sensible routine, the number of cases will be cut down.