Mycobacterium avium subspecies paratuberculosis in pooled faeces and dust from the housing environment of herds infected with Johne's disease. (12th January 2019) - Ramovic, Elvira; Yearsley, Dermot; NiGhallchoir, Eadaoin; Quinless, Emma; Galligan, Aoife; Markey, Bryan; Johnson, Alan; Hogan, Ian; Egan, John