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  • Title: Immunosuppression in Kenyan visceral leishmaniasis.
    Author: Ho M, Koech DK, Iha DW, Bryceson AD.
    Journal: Clin Exp Immunol; 1983 Feb; 51(2):207-14. PubMed ID: 6839538.
    Abstract:
    Cell-mediated immune responses were evaluated in 15 patients with active visceral leishmaniasis from Masinga location in eastern Kenya where the disease is endemic. Age and sex matched controls were selected from a village school in the same area. In vivo studies were carried out by skin testing with leishmanin, tuberculin, streptococcal and candida antigens. Lymphocyte blastogenic transformation to the mitogens phytohaemagglutinin (PHA) and concanavalin A (Con A) and the antigens purified protein derivative (PPD), streptokinase-streptodornase (SKSD) and leishmanial antigen (LA) was studied in vitro. The results showed that immunosuppression in visceral leishmaniasis in Kenya was both specific and non-specific. In the majority of patients there was complete anergy to all antigens in vivo and in vitro. The suppression of responses to mitogens was less marked. Recovery of non-specific responses preceded the development of specific immunity. In a small number of patients (23%) immune unresponsiveness to leishmanial antigens persisted 1 year after parasitological cure.
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