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Applied and Environmental Microbiology, August 1999, p. 3582-3587, Vol. 65, No. 8
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Use of Single-Strand Conformation Polymorphism Analysis To Examine the Variability of the rpoS Sequence in Environmental Isolates of Salmonellae

Suzanne J. Jordan,1 Christine E. R. Dodd,1,* and Gordon S. A. B. Stewart2,dagger

Division of Food Sciences, School of Biological Sciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD,1 and School of Pharmaceutical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD,2 United Kingdom

Received 29 January 1999/Accepted 27 May 1999

The natural environment places its resident microflora under stress, which may often result in adaptation by the microflora in order to increase the probability of survival. One such mechanism that has been postulated involves rpoS, which encodes a sigma factor that is known to enhance survival upon exposure to stress. The present work aimed to examine the genetic variability of rpoS in a selection of Salmonella enterica subspecies environmental isolates with an automated single-strand conformation polymorphism analysis technique. The results indicated that sequence variation does occur and that these changes are mainly located in two areas: at the center and near the end of the coding region. The variability was generally at the single-base level, although one strain (S. arizonae) did demonstrate significant differences in nucleotide sequence.

* Corresponding author. Mailing address: Division of Food Sciences, School of Biological Sciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom. Phone: 01159515163. Fax: 01159516162. E-mail: christine.dodd{at}nottingham.ac.uk.

dagger Professor Stewart died in February 1999, at age 47.

Applied and Environmental Microbiology, August 1999, p. 3582-3587, Vol. 65, No. 8
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:

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