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  • Title: Secretory IgA and complement levels in patients with hookworm infection in Zaria.
    Author: Musa BO, Onyemelukwe GC.
    Journal: Afr J Med Med Sci; 2000 Jun; 29(2):111-4. PubMed ID: 11379439.
    Abstract:
    As a continuing investigation into the immunological reactions involved in hookworm infection the levels of secretory IgA (sIgA). IgM, IgA, complement C3 and C4 were studied in 57 Nigerians with hookworm infection and compared with those of 28 healthy, normal controls. The hookworm patients were divided into three groups based on the degree of anaemia (Hb1-7 and hypochromia +++). Group II had moderate anaemia (Hb8-11, hypochromia ++ and Group III had no signs of anaemia despite the underlying hookworm infection. The patients also comprised those in whom hookworm was the sole infection and those with hookworm associated with other parasites. Significant differences in the results between each patient subgroup and the controls were analysed using the student t-test. IgA was significantly elevated in patients with anaemia of mild to moderate severity and in patients with hookworm only (P < 0.05) while sIgA was significantly elevated in all subgroups compared to controls (P < 0.05). IgM was significantly elevated in-patients with marked anaemia, in-patients without anaemia and in those with hookworm infection associated with other parasites (P < 0.05). The difference in IgG levels between patients and controls was not significant (P 0.1). C4 was significantly elevated in patients with marked moderate anaemia and those with hookworm only (P < 0.05) while C3 levels were not significantly different in the subgroups compared with controls. These results suggest the possibility of polyclonal B-cell activation by T-independent antigens such as the polysaccharide cuticular antigens of the hookworms and the stimulation of the classical pathway of the complement system.
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