Rapid determination of Trypanosoma cruzi urinary antigens in human chronic Chagas disease by agglutination test

Experimental Parasitology
A M KatzinJ F Yanovsky

Abstract

Detection of Trypanosoma cruzi in man becomes particularly difficult during the chronic stage of Chagas disease because of the low parasitemia. We were able to develop a simple and straightforward method for determining the concentration of T. cruzi antigens in urine using nitrocellulose micellar suspension (Nitrocell-Mr, Polychaco Argentina) and for their subsequent detection through a "latex" type agglutination test. The latex used was an esferocell nitrocellulose suspension (Esferocell-Mr, Polychaco). Specific antigens for T. cruzi were detected in 54 of 58 urine samples from chronic chagasic patients. The antigens characterized by affinity chromatography and SDS-PAGE were glycoproteins with apparent molecular weights (and pIs) of 100 kDa (pI 5 to 5.5), 80 kDa (pI 6.0), and 50 kDa (pI 6.5 to 7.0). This method is practical and fulfills the requirement of large-scale epidemiological studies. It is also helpful in cases of conflictive serology.

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Citations

Mar 1, 1995·São Paulo Medical Journal = Revista Paulista De Medicina·A W Ferreira, S D de Avila
Apr 14, 2021·Nature Nanotechnology·Jose Gomez-Marquez, Kimberly Hamad-Schifferli
Jun 1, 1991·Journal of Clinical Microbiology·M Rodriguez-del ValleD W Taylor

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