• Am. J. Trop. Med. Hyg. · Feb 2006

    Impairment of host immune response against strongyloides stercoralis by human T cell lymphotropic virus type 1 infection.

    • Tetsuo Hirata, Nobufumi Uchima, Kazuto Kishimoto, Osamu Zaha, Nagisa Kinjo, Akira Hokama, Hiroshi Sakugawa, Fukunori Kinjo, and Jiro Fujita.
    • Control and Prevention of Infectious Diseases, Department of Medicine and Therapeutics, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan. h400314@med.u-rykyu.ac.jp
    • Am. J. Trop. Med. Hyg. 2006 Feb 1; 74 (2): 246-9.

    AbstractA large-scale study was undertaken to clarify the prevalence rate of strongyloidiasis in Okinawa, Japan and to evaluate the relationship between strongyloidiasis and infection with human T cell lymphotropic virus type 1 (HTLV-1). The prevalence rate of Strongyloides stercoralis and HTLV-1 infection were 6.3% and 14.0%, respectively. Among 2,185 patients more than 50 years of age, the rate of S. stercoralis infection was significantly higher in patients with HTLV-1 infection compared with patients without HTLV-1 infection. In 252 patients treated with ivermectin, serum IgE levels and peripheral eosinophil counts were significantly lower in HTLV-1 co-infected patients compared with patients without HTLV-1 infection. In addition, the anthelmintic effect was significantly lower in patients with HTLV-1 infection compared with patients without HTLV-1 infection. Our prospective study demonstrated a prevalence rate for strongyloidiasis and HTLV-1 infections, and clearly demonstrated that co-infection with HTLV-1 impaired the immune response against S. stercoralis.

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