Please use this identifier to cite or link to this item: http://sgc.anlis.gob.ar/handle/123456789/2121
Title: Kinetic analysis of the humoral immune response against 3 Toxoplasma gondii-recombinant proteins in infants with suspected congenital toxoplasmosis
Authors: Altcheh, Jaime 
Diaz, N 
Pepe, Carolina M 
Martín, Valentina 
Nigro, Monica 
Freilij, Héctor 
Angel, Sergio O. 
Keywords: Toxoplasma;Toxoplasmosis Congénita;Etanercept;Diagnóstico
Issue Date: Oct-2006
Journal: Diagnostic microbiology and infectious disease 
Abstract: 
The reactivity values of Toxoplasma gondii ROP2, GRA4, and GRA7 recombinant antigens (rAgs) were analyzed by immunoglobulin G (IgG) enzyme-linked immunosorbent assay (ELISA) in 23 congenitally infected (I) and 36 noninfected (NI) infants. The reactivity values observed from the serum samples of I versus NI infants for each recombinant protein were 91% versus 67% for rROP2 (P = .05), 86% versus 29% for rGRA4 (P < .001), and 56% versus 11% for rGRA7 (P = .003). The follow-up showed that serum samples from NI infants became negative for specific IgG at 5.8 months (95% confidence interval [CI], 4.9-6.7) using a commercial assay; meanwhile, by specific recombinant protein ELISA, the samples became negative at 3.7 months with rROP2 (95% CI, 2.8-4.6), at 1.3 months with rGRA4 (95% CI, 0.8-1.8), and at 0.9 months with rGRA7 (95% CI, 0.5-1.3). Kinetic analysis also showed that serum samples from group I presented different IgG-profiles among rAgs. The rROP2 IgG profile was similar to that of the commercial assay, whereas rGRA4 and rGRA7 profiles showed a gradual decrease along the period of the study. The potential of the utility of rAgs to develop a diagnostic system that discriminates congenitally I infants from NI is discussed.
Description: 
Fil: Altcheh, Jaime. Hospital de Niños Dr. Ricardo Gutiérrez. Parasitología; Argentina.

Fil: Diaz, Natalia S. Hospital de Niños Dr. Ricardo Gutiérrez. Parasitología; Argentina.

Fil: Pepe, Carolina M. Hospital de Niños Dr. Ricardo Gutiérrez. Parasitología; Argentina.

Fil: Martin, Valentina. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Parasitología; Argentina.

Fil: Nigro, Monica. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Enfermedades Infecciosas. Departamento de Parasitología; Argentina.

Fil: Freilij, Héctor. Hospital de Niños Dr. Ricardo Gutiérrez. Parasitología; Argentina.

Fil: Angel, Sergio O. CONICET-UNSAM. Laboratorio de Parasitología Molecular, Chascomús; Argentina.
URI: http://sgc.anlis.gob.ar/handle/123456789/2121
ISSN: 0732-8893
DOI: 10.1016/j.diagmicrobio.2006.03.012
Rights: Closed Access
Appears in Collections:Publicaciones INEI

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