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. 1994 Feb;95(2):294–299. doi: 10.1111/j.1365-2249.1994.tb06526.x

The significance of blood levels of IgM, IgA, IgG and IgG subclasses in Sudanese visceral leishmaniasis patients.

A M Elassad 1, S A Younis 1, M Siddig 1, J Grayson 1, E Petersen 1, H W Ghalib 1
PMCID: PMC1534916  PMID: 8306504

Abstract

We developed an ELISA test using leishmania antigenic extracts to detect antigen-specific antibody responses, including subclass and isotype analysis, in visceral leishmaniasis (VL) patients from the Sudan. A total of 92 parasitologically proven patients were compared with cutaneous leishmaniasis, schistosomiasis, malaria, onchocerciasis and tuberculosis patients, as well as with healthy endemic and non-endemic controls. Some VL patients were examined before and after chemotherapy. VL patients showed significantly higher IgG responses compared with all other groups (93.4% sensitivity, 93.7% specificity), and higher (but not significantly) IgM responses. All groups showed low IgA levels. All IgG subclasses, IgG1, 2, 3, and 4, showed higher levels in patients than all other groups, with IgG1 and IgG3 levels being significantly reduced following treatment. The rank order for specificity and sensitivity for IgG subclasses was IgG3 > IgG1 > IgG2 > IgG4.

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Selected References

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