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Correlation of change in phage type with pulsed field profile and 16S rrn profile in Salmonella enteritidis phage types 4, 7 and 9a

  • N. G. Powell (a1), E. J. Threlfall (a1), H. Chart (a1), S. L. Schofield (a1) and B. Rowe (a1)
  • DOI:
  • Published online: 01 May 2009

Using pulsed-field gel electrophoresis (PFGE) and 16S rRNA (rrn) analysis (ribotyping). the in viro derivation of strains of Salmonella enteritidis PTs 9a and 7 from a strain of S. enteritidis PT 4 has been demonstrated. All strains were isolated from a single patient over a 6-week period. Further studies have demonstrated that in terms of pulsed-field profile and ribotype, the genotypes of the patient-derived strains differed from those of the reference strains of the respective phage types. It is concluded that when used in combination, these methods can provide evidence of phylogenetic relationships in apparently unrelated S. enteritidis phage types isolated during pathogenesis of disease.

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2.EJ Threlfall , H Chart , LR Ward , JDH de Sa . Interrelationships between strains of Salmonella enteritidis belonging to phage types 4. 7. 7a. 8. 13. 13a, 23. 24 and 30. J Appl Bact 1993; 75: 43–8.

4.H Chart , B Rowe , EJ Threlfall , LR Ward . Conversion of Salmonella enteritidis phage type 4 to phage type 7 involves loss of lipopolysaccharide with a concomitant loss of virulence. FEMS Microbiol Lett 1989: 60: 3740.

5.NG Powell , EJ Threlfall , H Chart , B Rowe . Subdivision of Salmonella enteritidis PT 4 by pulsed field gel electrophoresis: potential for epidemiological surveillance. FEMS Microbiol Lett 1994; 119: 193–8.

8.J Stanley , NG Powell , C Jones . A framework for LS200. 16S rRNA-gene and plasmid profile analysis in Salmonella serogroup Dl. J Med Microbiol 1994; 41: 112–9.

9.H Chart , EJ Threlfall , B Rowe . Virulence of Salmonella enteritidis phage type 4 is related to the possession of a 38 MDa plasmid. FEMS Microbiol Lett 1989; 58: 299304.

10.EJ Threlfall , MD Hampton , H Chart , B Rowe . Identification of a conjugative plasmid carrying antibiotic resistance and salmonella plasmid virulence (spv) genes in epidemic strains of Salmonella typhimurium phage type 193. Lett Appl Microbiol 1994: 18: 82–5.

12.J Brosius , ML Palmer , PJ Kennedy , HF Noller . Complete nucleotide sequence of 16S ribosomal RNA gene from Escherichia coli. Proc Nat Acad Sci 1978; 75: 4801–5.

13.J Stanley , N Baquar . Phylogenetics of Salmonella enteritidis. Internal J Food Microbiol 1994; 21: 7987.

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Epidemiology & Infection
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