A Salmonella outbreak in Hopkins County, Kentucky, has killed one person and caused another seven confirmed illnesses. The cause of the outbreak is still unknown, according to county health officials. Investigators have begun interviewing victims to see where or what they might have eaten in the days leading up to their illnesses. Officials from the health department tell TristateHomepage.com they hope to determine the cause in the coming weeks. Often in cases like this, investigators don’t have enough information to definitively identify an outbreak source. Symptoms of Salmonella infection include diarrhea, fever and abdominal cramping. They generally develop 12 to 72 hours after exposure, and last between four and seven days.