Differential typing of Salmonella agona: type divergence in a new serotype.
An international collection of 419 isolates of Salmonella agona was phage typed, biotyped and colicine typed. Of 16 recognized phage types, 15 were represented. Three phage types (I, V and XVI) accounted for 84% of all isolates, were widely distributed and may be interconvertible. Biotyping afforded little type differentiation; thus 92.6% of the isolates belonged to biotype 1 a. A rhamnose non-fermenting variant line (of biotype 5a) became established in Zaire from 1979 to 1980. A maltose late-fermenting line of biotype 1 a, isolated in Scotland in 1974, did not thereafter become established. Two Col+ lines (producing colicine I b) accounted for 45 of 68 colicinogenic isolates. The implication of type diversification and the phylogenetic significance of these findings are discussed.
D000596:Amino Acids / Q000494:pharmacology; D001434:Bacteriophage Typing; D050260:Carbohydrate Metabolism; D003087:Colicins / Q000096:biosynthesis; D005285:Fermentation; D008320:Maltose / Q000378:metabolism; D012210:Rhamnose / Q000378:metabolism; D012475:Salmonella / Q000145:classification* / Q000378:metabolism; D012483:Salmonella Phages; D012703:Serotyping
D000596:Amino Acids; D003087:Colicins; D008320:Maltose; D012210:Rhamnose