It is not yet known how long the salmonella-infected Landbrügg cheese dairy in Schüpfheim, canton Lucerne, will remain closed. According to the cantonal authorities, this is being examined as part of its enforcement activities. +Get the most important news from Switzerland in your inbox The salmonella outbreak became known on April 3, following a product recall by major distributors Coop and Migros. As the deputy cantonal chemist for Lucerne, Susanne Losio, told the Swiss News Agency Keystone-SDA on Tuesday, the Department of Food Inspection and Consumer Protection was informed on Thursday of the suspicion that cheese could be contaminated with salmonella. The suspicion was confirmed by analyses on Friday, she explained. As a result, a product recall was immediately initiated in collaboration with the companies and enforcement authorities involved. Any further measures are the subject of ongoing investigations. + Consumers are still buying food which makes them sick. How come?