FIG. 2.

Association of serotype Typhimurium phage types 1aPhi4/6B (DT46) and 4/3 (DT8) with disease in ducks in Germany between 1974 and 1996. Serotype Typhimurium strains were phage typed in the National Reference Laboratory for Salmonella Berlin, Wernigerode Branch, which was a part of the Federal Institute for Health Protection of Consumers and Veterinary Medicine Berlin. The number of annual 1aPhi4/6B (closed circles) and 4/3 (open squares) isolations from ducks is expressed as a percentage of the total number of serotype Typhimurium cultures from this source.