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    Threlfall, E. John 2010. Topley & Wilson's Microbiology and Microbial Infections.

    Olsen, J.E. Brown, D.J. Skov, M.N. and Christensen, J.P. 1993. Bacterial typing methods suitable for epidemiological analysis. applications in investigations of salmonellosis among livestock. Veterinary Quarterly, Vol. 15, Issue. 4, p. 125.

    YOUSUF, A. A. LING, T. K. W. and BARKER, RUTH M. 1987. Differentiation of Coll plasmids by ability to cause abortive infection of bacteriophages BF23 and T5. Letters in Applied Microbiology, Vol. 5, Issue. 2, p. 33.

    BARKER, RUTH M. 1986. Epidemic strains of Salmonella agona differentiated by phage restriction and u. v.-protection markers on Collb plasmids. Letters in Applied Microbiology, Vol. 3, Issue. 5, p. 101.

    Old, D. C. Munro, D. S. Reilly, W. J. and Sharp, J. C.M. 1985. Biotype discrimination of Salmonella montevideo. Letters in Applied Microbiology, Vol. 1, Issue. 4, p. 67.

    Vicente, Ana C. P. and de Almeida, D. F. 1984. Identification of multiple-resistance (R) and colicinogeny (Col) plasmids in an epidemic Salmonella agona serotype in Rio de Janeiro. Journal of Hygiene, Vol. 93, Issue. 01, p. 79.


Differential typing of Salmonella agona: type divergence in a new serotype

  • Ruth Barker (a1), D. C. Old (a1) and Zofia Tyc (a2)
  • DOI:
  • Published online: 01 March 2010

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.

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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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