Transcription of candidate virulence genes of Haemophilus ducreyi during infection of human volunteers

R. E. Throm, Stanley Spinola

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Haemophilus ducreyi expresses several putative virulence factors in vitro. Isogenic mutant-to-parent comparisons have been performed in a human model of experimental infection to examine whether specific gene products are involved in pathogenesis. Several mutants (momp, ftpA, losB, lst, cdtC, and hhdB) were as virulent as the parent in the human model, suggesting that their gene products did not play a major role in pustule formation. However, we could not exclude the possibility that the gene of interest was not expressed during the initial stages of infection. Biopsies of pustules obtained from volunteers infected with H. ducreyi were subjected to reverse transcription-PCR. Transcripts corresponding to momp, ftpA, losB, lst, cdtB, and hhdA were expressed in vivo. In addition, transcripts for other putative virulence determinants such as ompA2, tdhA, lspA1, and lspA2 were detected in the biopsies. These results indicate that although several candidate virulence determinants are expressed during experimental infection, they do not have a major role in the initial stages of pathogenesis.

Original languageEnglish
Pages (from-to)1483-1487
Number of pages5
JournalInfection and Immunity
Volume69
Issue number3
DOIs
StatePublished - 2001

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Haemophilus ducreyi
Virulence
Volunteers
Infection
Genes
Biopsy
Virulence Factors
Reverse Transcription
Theoretical Models
Polymerase Chain Reaction

ASJC Scopus subject areas

  • Immunology

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Transcription of candidate virulence genes of Haemophilus ducreyi during infection of human volunteers. / Throm, R. E.; Spinola, Stanley.

In: Infection and Immunity, Vol. 69, No. 3, 2001, p. 1483-1487.

Research output: Contribution to journalArticle

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