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Journal of Clinical Microbiology, Jul 1995, 1797-1803, Vol 33, No. 7
AF Norman, R Regnery, P Jameson, C Greene and DC Krause
The citrate synthase gene (gltA) of Bartonella henselae was cloned and
sequenced to compare genetic divergence among alpha and gamma branches of
the class Proteobacteria and to develop enhanced genotypic reagents for B.
henselae identification. B. henselae gltA is 1,293 nucleotides in length
and 63 to 66% homologous with corresponding gene sequences of Rickettsia
prowazekii, Escherichia coli, and Coxiella burnetii. The observed genetic
variability suggests that gltA sequences can provide a useful means for
studying moderate divergence among related bacteria. Oligonucleotides
specific for B. henselae gltA were evaluated for the ability to prime PCR
amplification within the alpha and gamma branches of the proteobacteria.
Under the conditions used, only B. henselae, Bartonella quintana, and R.
prowazekii template DNAs yielded amplification products (approximately 380
bp). DNAs from 28 Bartonella- like isolates of feline origin were amplified
by B. henselae primers and analyzed for restriction fragment length
polymorphism. The resulting patterns for all 28 isolates were similar or
identical to that of the recognized B. henselae strain. Current studies are
aimed at optimization of PCR conditions for specificity and sensitivity of
amplification of Bartonella sequences from clinical isolates.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Differentiation of Bartonella-like isolates at the species level by PCR- restriction fragment length polymorphism in the citrate synthase gene
Department of Microbiology, University of Georgia, Athens, USA.
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