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  • Title: Increased prevalence of leukocytes and elevated cytokine levels in semen from Schistosoma haematobium-infected individuals.
    Author: Leutscher PD, Pedersen M, Raharisolo C, Jensen JS, Hoffmann S, Lisse I, Ostrowski SR, Reimert CM, Mauclere P, Ullum H.
    Journal: J Infect Dis; 2005 May 15; 191(10):1639-47. PubMed ID: 15838790.
    Abstract:
    In this study, we investigated the seminal inflammatory response to egg infestation of the urogenital organs in 240 semen-donating men aged 15-49 years living in a Schistosoma haematobium-endemic area of Madagascar. In 29 subjects (12%) with excretion of > or =5 ova/ejaculate, leukocytospermia (>10(6) leukocytes/mL) and the presence of seminal lymphocytes and eosinophil leukocytes were each significantly more prevalent than in 74 subjects (31%) who were S. haematobium negative (P<.01). In addition, seminal levels of interleukin (IL)-4, IL-6, IL-10, and tumor necrosis factor- alpha were significantly higher among seminal egg-excreting subjects than among infection-negative subjects (P<.001). Sexually transmitted infection (STI) with Neisseria gonorrhoeae, Chlamydia trachomatis, Mycoplasma genitalium, and/or Trichomonas vaginalis did not act as a confounding factor for the observed associations. At follow-up, 6 months after systematic antischistosomiasis and STI syndrome treatment at baseline, the prevalence of seminal leukocytes decreased significantly among the previously seminal egg-positive subjects. The same tendency was observed for the posttreatment levels of cytokines. Numerous studies have already shown an association between STI-associated genital inflammation and human immunodeficiency virus (HIV) propagation. Therefore, the results of the present study suggest that male urogenital schistosomiasis may constitute a risk factor for HIV transmission, as a result of egg-induced inflammation in the semen-producing pelvic organs.
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