Gassner Lactose Agar is used for detection and isolation of pathogenic Enterobacteriaceae from foodtuffs and other materials. This medium has been prescribed in the regulations for the execution of the German Meat Inspection Law (Deutsches Fleischbeschaugesetz).
1.Gassner G., 1918, Centralbl. F. Bakt. I. Orig., 80:219-222.2.Deutsches Fleischbeschaugesetz: Anlage 1 zu § 20 Abs. 4:Vorschriften über die bakteriologische Fleischuntersuchung.