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  • 1
    In: The Journal of Infectious Diseases, 2016, Vol. 214(3), pp.489-495
    Description: Background.  In humans inoculated with Haemophilus ducreyi , there are host effects on the possible clinical outcomes—pustule formation versus spontaneous resolution of infection. However, the immunogenetic factors that influence these outcomes are unknown. Here we examined the role of 14 single-nucleotide polymorphisms (SNPs) in 7 selected pathogen-recognition pathways and cytokine genes on the gradated outcomes of experimental infection. Methods.  DNAs from 105 volunteers infected with H. ducreyi at 3 sites were genotyped for SNPs, using real-time polymerase chain reaction. The participants were classified into 2 cohorts, by race, and into 4 groups, based on whether they formed 0, 1, 2, or 3 pustules. χ 2 tests for trend and logistic regression analyses were performed on the data. Results.  In European Americans, the most significant findings were a protective association of the TLR9 +2848 GG genotype and a risk-enhancing association of the TLR9 TA haplotype with pustule formation; logistic regression showed a trend toward protection for the TLR9 +2848 GG genotype. In African Americans, logistic regression showed a protective effect for the IL10 – 2849 AA genotype and a risk-enhancing effect for the IL10 AAC haplotype. Conclusions.  Variations in TLR9 and IL10 are associated with the outcome of H. ducreyi infection.
    Keywords: 〈Kwd〉〈Italic Toggle="Yes"〉Haemophilus Ducreyi〈/Italic〉〈/Kwd〉 ; Chancroid ; Skin Ulcers ; Immunogenetics ; Humans ; Innate Immunity
    ISSN: 0022-1899
    E-ISSN: 1537-6613
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  • 2
    In: Clinical Infectious Diseases, 2018, Vol. 67(11), pp.1768-1774
    Description: Haemophilus ducreyi is a major cause of skin ulcers in the tropics. On an endemic island, multiple strains of H. ducreyi cause infection, coinfections are common, and mass treatment with azithromycin did not exert selection pressure on the organism.
    Keywords: 〈Kwd〉 〈Italic Toggle="Yes"〉Haemophilus Ducreyi〈/Italic〉 〈/Kwd〉 ; Cutaneous Ulcers ; Single - Locus Typing ; Molecular Epidemiology
    ISSN: 1058-4838
    E-ISSN: 1537-6591
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