CARSON  (AP) — Authorities say a Los Angeles County man infected with the West Nile virus has died and health officials are trying to determine whether the illness caused his death.

The Long Beach Press-Telegram says the 78-year-old Carson man died Tuesday night. His family says he was hospitalized two weeks earlier with symptoms that included slurred speech, pain and memory loss.

Five cases of the mosquito-borne disease have been reported this year in the county.

Most people who contract West Nile have mild or no symptoms but it can be deadly to the elderly and those with compromised immune systems. There were six deaths in LA County last year.