The use of contaminated bread crumbs produced from bakery waste was identified as the source and evidence indicated that the contamination problem was likely to have started in September 2008.
Fuarthas amach gurb é bruscar aráin éillithe a bhí mar fhoinse na faidhbe agus go raibh seans maith ann gur thosaigh an fhadhb i Mí Mheán Fómhair 2008.