Detection of Rochalimaea henselae DNA in specimens from cat scratch disease patients by PCR.
Journal: 1994/August - Journal of Clinical Microbiology
ISSN: 0095-1137
PUBMED: 8027347
Abstract:
A PCR assay was developed by using degenerate primers that allow amplification of a 414-bp fragment of DNA from the rickettsia-like organisms Rochalimaea henselae and R. quintana. Internal oligonucleotides were used as hybridization probes, permitting rapid differentiation of these two Rochalimaea species. DNAs from 12 different isolates of R. henselae were amplified with the PCR primers, and the resulting 414-bp PCR product hybridized only with the R. henselae-specific probe. DNAs from four different isolates of R. quintana were amplified and produced a PCR product of the same size that hybridized only with the R. quintana-specific probe. DNAs from isolates of R. elizabethae, R. vinsonii, Bartonella bacilliformis, and Afipia felis failed to amplify the 414-bp fragment in the PCR assay. This two-step assay was applied to DNAs extracted from 16 fresh (unfixed) lymph node biopsy specimens and nine aspirates from patients with clinical cat scratch disease (CSD) to assay for the presence of R. henselae or R. quintana DNA in these samples. Twenty-one (84%) of 25 lymph node samples from CSD patients were positive for R. henselae, while none were positive for R. quintana. The characteristic 414-bp fragment was not amplified from eight lymph node tissue samples from non-CSD cases. These results provide evidence that R. henselae, and not R. quintana, plays the central role in the etiology of CSD.
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J Clin Microbiol 32(4): 942-948

Detection of Rochalimaea henselae DNA in specimens from cat scratch disease patients by PCR.

Abstract

A PCR assay was developed by using degenerate primers that allow amplification of a 414-bp fragment of DNA from the rickettsia-like organisms Rochalimaea henselae and R. quintana. Internal oligonucleotides were used as hybridization probes, permitting rapid differentiation of these two Rochalimaea species. DNAs from 12 different isolates of R. henselae were amplified with the PCR primers, and the resulting 414-bp PCR product hybridized only with the R. henselae-specific probe. DNAs from four different isolates of R. quintana were amplified and produced a PCR product of the same size that hybridized only with the R. quintana-specific probe. DNAs from isolates of R. elizabethae, R. vinsonii, Bartonella bacilliformis, and Afipia felis failed to amplify the 414-bp fragment in the PCR assay. This two-step assay was applied to DNAs extracted from 16 fresh (unfixed) lymph node biopsy specimens and nine aspirates from patients with clinical cat scratch disease (CSD) to assay for the presence of R. henselae or R. quintana DNA in these samples. Twenty-one (84%) of 25 lymph node samples from CSD patients were positive for R. henselae, while none were positive for R. quintana. The characteristic 414-bp fragment was not amplified from eight lymph node tissue samples from non-CSD cases. These results provide evidence that R. henselae, and not R. quintana, plays the central role in the etiology of CSD.

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Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333.
Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333.
Abstract
A PCR assay was developed by using degenerate primers that allow amplification of a 414-bp fragment of DNA from the rickettsia-like organisms Rochalimaea henselae and R. quintana. Internal oligonucleotides were used as hybridization probes, permitting rapid differentiation of these two Rochalimaea species. DNAs from 12 different isolates of R. henselae were amplified with the PCR primers, and the resulting 414-bp PCR product hybridized only with the R. henselae-specific probe. DNAs from four different isolates of R. quintana were amplified and produced a PCR product of the same size that hybridized only with the R. quintana-specific probe. DNAs from isolates of R. elizabethae, R. vinsonii, Bartonella bacilliformis, and Afipia felis failed to amplify the 414-bp fragment in the PCR assay. This two-step assay was applied to DNAs extracted from 16 fresh (unfixed) lymph node biopsy specimens and nine aspirates from patients with clinical cat scratch disease (CSD) to assay for the presence of R. henselae or R. quintana DNA in these samples. Twenty-one (84%) of 25 lymph node samples from CSD patients were positive for R. henselae, while none were positive for R. quintana. The characteristic 414-bp fragment was not amplified from eight lymph node tissue samples from non-CSD cases. These results provide evidence that R. henselae, and not R. quintana, plays the central role in the etiology of CSD.
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