a1 WHO Collaborating Centre for Phage Typing and Resistance of Enterobacteria, Division of Enteric Pathogens, Central Public Health Laboratory, Colindale Avenue, London NW9 5HT
For many years phage typing has proved invaluable in epidemiological studies on Salmonella typhi, S. paratyphi A and B, S. typhimurium and a few other serotypes. A phage-typing scheme for S. enteritidis is described. This scheme to date differentiates 27 types using 10 typing phages.
(Accepted April 03 1987)