(AP) — Nebraska has raised the number of confirmed cyclospora cases in the state to 86.

The Nebraska Department of Health and Human Services says eight cases have been confirmed since July 30, when 78 were listed.

The infections started in June, and officials say none of those identified lately is believed to be from a new outbreak.

The stomach illnesses in Iowa and Nebraska have been linked to salad mix served at local Olive Garden and Red Lobster restaurants and supplied by a Mexican farm.

Iowa said last week that it had 146 confirmed cases, but a new figure is expected to be released Thursday.

Officials say the outbreak of cyclospora infections numbers nearly 470 people in 16 states. The illness comes from fecal contamination and causes diarrhea and other symptoms.