7:30 p.m.There have been three confirmed cases of E. coli in Napa County, affecting children who ate at two Little League baseball snack shacks, according to the county department of health and human services.

E. coli infection causes abdominal cramps and diarrhea, sometimes bloody diarrhea. There is usually little or no fever and illness typically resolves itself in five to 10 days. People with any of these symptoms should contact their physician.

The youngsters got the illness from eating hamburger patties, said Karen Smith, Napa County public health officer.

“They all have fully recovered,” she said.

The first case was reported to the county health department on April 3, by a Santa Rosa physician who was treating a 9-year-old boy who tested positive for having E. coli in his stools, Smith said.

The last case was reported on April 4, she said.

“We interviewed the boy’s family. They gave us a very detailed food history of what the boy had eaten,” Smith said.

There were also two other children who had the E. coli symptoms, but they did not test positive for the illness, she said.

The main thing the youngsters had in common was that they had eaten at the snack shacks at the St. Helena and Calistoga Little League fields.

“We got a sample of the meat from both of the snack shacks and sent it to the state department of health for testing,” Smith said.

St. Helena got its meat from the Salami Lady’s Cash & Carry in Napa and Calistoga got its meat from Costco.

Smith said the hamburger patties from Salami Lady tested positive for E. coli. “We were not able to get sample from Costco, but when the meat from the Calistoga Little League snack shack did not test positive for E. coli we did not pursue it any further,” Smith said.

On Friday, Dr. Mark Horton, state public health officer, announced that the Merced-based Richwood Meat Company, which produced the affected meat has agreed to recall about 100,000 pounds of products that were distributed in California Arizona, Idaho, Oregon and Washington.

The products being recalled are hamburger patties and ground beef with the following names on the label: Fireriver, Chef’s Pride, Ritz Food, Blackwood Farms, California Pacific Associates, C & C Distributing, Golbon and Richwood.

“Anyone who has any of the recalled products should either discard the meat or return it to the place of purchase,” Smith said. “This meat should not be eaten under any circumstances.”

Attempts to reach the owner of the Salami Lady for comment on Friday evening were unsuccessful.