Authorities continue to investigate an outbreak of salmonella in Southeastern Idaho that has left six people sick with the bacterial infection.

Southeastern District Health Department spokeswoman Mary Howell says officials are awaiting test results from a state lab that could narrow down the specific strain of the salmonella. Then, authorities might be able to pinpoint whether the outbreak was caused by food, animals or another source.

The first case was reported in Blackfoot May 10. Salmonella symptoms begin 12 to 72 hours after exposure and include severe diarrhea, fever and abdominal discomfort.