Mild winter and rainy spring contributing to spread of West Nile virus

The West Nile virus is spreading faster than it has in previous years.

The number of cases is nearing 700 nationwide, with nearly 30 deaths reported.

Locally, however, it hasn't been spreading at a faster rate than normal, according to the Johnson County and Kansas City Health Departments.

There have been four cases reported in Kansas this year.  Three were reported in Missouri -- one of which was fatal.

Climate experts say the mild winter and rainy spring became the perfect breeding ground for mosquitoes, who get the virus from birds.

And although mosquitoes thrive on standing water, the drought has added to the problem.

"With fewer water sources, mosquitoes and birds find themselves closer together," said Vanderbilt Dr. William Schaffner.

So that means it's been easier for mosquitoes to get infected, then transmit the virus to people.

Experts recommend using inspect repellent outdoors, draining areas of standing water, like in bird baths, and wearing long sleeves and pants when outside at dawn and dusk, when mosquitoes are most active.