Tropical mosquito infestation grows

The Disneyland site is particularly concerning, said Orange County Vector Control spokesman Jared Dever, because these mosquitoes spread diseases after biting a person who is sick - typically a traveler from a region where the diseases are prevalent, including Mexico and the Caribbean. The insects will also bite during the daytime. This year, West Nile virus has killed 32 California residents, the most since it was first detected in the state in 2003. West Nile Virus was first found in Orange Co