Foodstuffs has confirmed two of its Pams lettuce products were named in a report listing possible sources of a painful food poisoning epidemic.

There have been 127 confirmed cases of yersinia pseudo-tuberculosis and 38 people have been hospitalised.

Environmental and Scientific Research reports have been provided to the Ministry for Primary Industries, updating the possible source of the stomach bug, including a range of potential foods.

However, the ministry is refusing to release the list, saying the information is far from conclusive.