Summary: Two series of adapted phages were compared: the first consisted of phage preparations belonging to three different antigenic groups, the second series was antigenically homogeneous. The two typing schemes based on these phage preparations yielded entirely different groupings of the Salmonella typhimurium strains examined. Nevertheless, by each of the schemes it was possible to identify those strains which were related epidemiologically. These findings are compared with those obtained with Lilleengen’s series of selected anti-O phages, which are employed in Sweden. The place of phage typing in epidemiological and epizootiological investigations is discussed. It is concluded that it is unnecessary to attempt international standardization of the phage typing of S. typhimurium or of any other Salmonella species which cause food poisoning in man.
CherryW.B., DavisB.R., EdwardsP.R.1953; Observations on the types and typing of Salmonella paratyphi B cultures in the United States. Amer. J. publ.Hlth 43:1280
GillespieE.H.1946; A case of food poisoning in man probably caused by the consumption of a duck’s egg (further report). Mon. Bull. Minist. Hlth Lab. Serv. 5:157
HamonY., NicolleP.1951; Recherches sur les facteurs qui conditionnent l’appartenance des bacilles paratyphiques B aux différents types bactério-phagiques de Felix et Callow. II. Ann. Inst.Pasteur 80:496
NicolleP., HamonY., EdlingerE.1951; Recherches sur les facteurs qui conditionnent l’appartenance des bacilles paratyphiques B aux différents types bactériophagiques de Felix et Callow. I. Ann. Inst.Pasteur 80:479
NicolleP., PavlatouM., DiverneauG.1953; Subdivision de quelques types Vi fréquents de Salmonella typhi par les lysotypies auxiliaries. C.R. Acad. Sci., Paris 236:2453
ScholtensR.TH.1952; The formation of bacteriophages in mixed cultures by recombination of genetic elements ; characterisation of phage types of Salmonella paratyphi B by phage reactions and lysogenic properties. Leeuwenhoek ned. Tijdschr. 18:257
ScholtensR.TH.1955a; Characterization and grouping of phage types of Salmonella paratyphi B, especially of a new type ‘Sittard’, by senstitivity to type phages and by lysogenic properties. J. Hyg., Camb. 53:1
ScholtensR.TH.1955b; Phage typing of Salmonella paratyphi B; an arrangement of phage types based on the study of lysogenicity. Leeuwenhoek ned. Tijdschr. in the Press