Fox News Health officials in Mississippi say they've confirmed a case of the West Nile virus.

Fox News Health This is the second documented occurrence of the disease for the Magnolia State.

Fox News Health More than 150 people were reported to contract West Nile virus last year, Illinois health officials said. Five people died.

NBC News A surprising new study finds that mosquito populations have exploded in parts of the U.S. — but not because of a warming climate.

The Wall Street Journal West Nile virus may be deadlier than public health officials and doctors have thought, according to a new study.

Fox News Health The test is designed to detect the genetic material of the virus and can distinguish Zika virus from dengue, West Nile or chikungunya virus infections. It will initially be offered to patients with a positive travel history and symptoms consistent wi Read more ... th Zika including rash, joint pain and fever, as well as asymptomatic pregnant women with a positive travel history.

Los Angeles Times Across the state, 517 people have tested positive for the virus this year.

Newsweek Cities spray pesticides to kill mosquitoes carrying West Nile—but it's the pesticides that are the real threat.

Los Angeles Times Experts think California's drought may have led to the increased West Nile activity: With fewer sources of water, birds and mosquitoes are coming into closer contact with humans in their search for water, increasing the chance of transmission.

NBC News It might be possible to forecast when West Nile virus will hit a certain region based on how hot it was the year before.