Listen to the interview with Guidry News

The emergence of West Nile virus in the Western Hemisphere in 1999 poses an ongoing public health threat as the most common cause of epidemic encephalitis in the United States. Transmission occurs in a cycle involving mosquitoes, birds; horses, humans and other mammals. Human infections cause no symptoms in 80 percent of cases. West Nile fever develops in approximately 20 percent of infected patients. The fever can progress to neuroinvasive disease in a small number of cases. UTMB has been to studying the incidence of West Nile virus in the Houston metropolitan region for many years. Dr. Alan Barrett discusses recent findings with Jim Guidry of Guidry News Service.