SASH3 and respiratory tract infectious disorder: Two serotype-2/serotype-1/2 isolates carrying epf, mrp and sly were obtained from carrier animals from collection A and one originated from the lung in collection B. However, as mentioned before, for lung isolates an assignment to respiratory disease is sometimes difficult, i.e. this epf positive isolate may originate from a systemic infection, which has spread from a respiratory infection.