LONDON—European health officials investigating an outbreak of salmonella linked to chocolate Easter eggs that has sickened at least 150 children across the continent said Tuesday they suspect it is due to bad buttermilk in a Belgian factory.
In an assessment of the continuing outbreak, experts at the European Center for Disease Prevention and Control and the European Food Safety Authority said they had matched the same salmonella strain currently infecting people to samples taken from a factory in Belgium last December.
