Salmonella Typing and Colonisation of Chickens by Characterised Salmonella sofia

  • 65 pages

  • Published: 1 Dec 2004

  • Author(s): Heuzenroeder, M. W., Murray, C. J., .., D.Davos

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Salmonella Sofia currently represents around 50% of all chicken isolates of Salmonella submitted for typing by the poultry industry to the Australian Salmonella Reference Centre at IMVS. Despite the ubiquitous nature of this organism it is almost never associated with human disease. Database searches also confirm that S. Sofia is seldom seen elsewhere as associated with human disease. This compelling circumstantial evidence suggests that the organism is a virulent and a very efficient coloniser of chickens. Research was therefore undertaken to investigate whether S. Sofia can exclude virulent serovars using genetically characterised natural and mutant strains. Genetic characterisation of S. Sofia isolates from both Australia and overseas was also undertaken to determine whether S. Sofia from Australia form a unique genetic clone that might explain the extent of colonisation of Australian chickens by S. Sofia. 2004, 64pgs, Pub. No. 04/138, $16