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Journal of Clinical Microbiology, Nov 1997, 2810-2814, Vol 35, No. 11
RJ Meinersmann, LO Helsel, PI Fields and KL Hiett
Comparison of the entire coding sequence of flaA (1,764 nucleotides) from
15 isolates of Campylobacter jejuni showed two regions of high variability,
one region approximately from base positions 700 to 1,450 and a short
variable region (SVR) from base positions 450 to 600. Parsimony analysis of
the SVR sequences yielded a dendrogram similar to that which was derived by
analysis of the entire gene. PCR was used to generate templates, and the
SVR was sequenced with primers constructed to hybridize to conserved
flanking sequences. The SVRs of 22 isolates of C. jejuni from four
outbreaks that have been well characterized and a larger panel of isolates
from three additional outbreaks were sequenced. Analysis of the nucleotide
sequences produced results that grouped the isolates very similarly to
other subtyping techniques. Sequence data were also generated for isolates
from three additional outbreaks. Categorizing the isolates by fla SVR DNA
sequence placed them in epidemiologically relevant groups. Sequence
analysis of the C. jejuni flaA SVR may be a useful tool for epidemiologic
investigations and could complement or replace serotyping and other
subtyping methods.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Discrimination of Campylobacter jejuni isolates by fla gene sequencing [In Process Citation]
Agricultural Research Service, U.S. Department of Agriculture, Athens, Georgia 30604, USA. Rmeiners@asrr.arsusda.gov
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