Abstract
Filarial parasite, responsible for filariasis is known to remain in the host for long periods of time. A 29 kDa protein isolated fromSetaria digitata by gel electrophoresis and electroelution of detergent soluble surface antigens showed a 70% inhibition of the cell mediated immune response. On evaluation of its diagnostic application, the same protein was found to be very sensitive in detecting antibody at an antigenic protein concentration as low as 1 ng per μl. The cross reactivity of surface antigen with bancroftian filarial patient’s sera was tested by Dot-ELISA and ELISA. Both the antigen as well as antibody detection tests showed 100% positivity with all types of filariasis cases. It did not produce any positive reaction with non-endemic control sera. However, a proportion of endemic normal subjects showed positivity and this is attributed to the fact that people in endemic areas are exposed to infective mosquito bites. The biological property of inhibition and 100% positivity of filariasis cases in both antibody and antigen detection tests point towards the bifunctional nature of the surface proteins before and after release. The same may be happening under normal conditions also, perhaps at a much lower rate
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John, L., Bright, J.J. & Raj, R.K. Biological activity and diagnostic use of detergent soluble antigens fromSetaria digitata . J. Biosci. 20, 69–81 (1995). https://doi.org/10.1007/BF02711582
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DOI: https://doi.org/10.1007/BF02711582