Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondii
It is quite difficult to diagnose active toxoplasmosis in patients with ocular toxoplasmosis. Active posterior uveitis presumably due to Toxoplasma gondii infection (APUPT) is seldom produced during a prime-infection; hence most patients do not show high IgM antibodies. High levels of IgA have been described in active toxoplasmosis. The purpose of this study was to investigate possible association between APUPT and the specific anti-parasite sIgA in tears. The study was carried out as case-control. Tears of 25 clinically confirmed APUPT patients and 50 healthy control subjects were analyzed. All were IgG seropositive. Specific sIgA was determined by ELISA assay using T. gondii RH strain crude extract. Anti-T. gondii sIgA was found in 84% of the cases and in 22% of the control subjects. The intensity of the reaction was higher in APUPT cases (P = 0.007). There was strong association between APUPT patients and lacrimal sIgA (odds-ratio 18.61, P = 0.0001). ELISA test sensitivity was 84% and specificity 78% . Our data suggest that anti-T.gondii secretory IgA found in tears may become an important marker for active ocular toxoplasmosis.
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Instituto Oswaldo Cruz, Ministério da Saúde
2004
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oai:scielo:S0074-027620040008000132005-03-04Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondiiLynch,Maria IsabelCordeiro,FranciscoFerreira,SilvanaXimenes,RicardoOréfice,FernandoMalagueño,Elizabeth anti-Toxoplasma gondii secretory IgA ocular toxoplasmosis diagnosis antibodies anti-T. gondii secretory IgA and ocular toxoplasmosis It is quite difficult to diagnose active toxoplasmosis in patients with ocular toxoplasmosis. Active posterior uveitis presumably due to Toxoplasma gondii infection (APUPT) is seldom produced during a prime-infection; hence most patients do not show high IgM antibodies. High levels of IgA have been described in active toxoplasmosis. The purpose of this study was to investigate possible association between APUPT and the specific anti-parasite sIgA in tears. The study was carried out as case-control. Tears of 25 clinically confirmed APUPT patients and 50 healthy control subjects were analyzed. All were IgG seropositive. Specific sIgA was determined by ELISA assay using T. gondii RH strain crude extract. Anti-T. gondii sIgA was found in 84% of the cases and in 22% of the control subjects. The intensity of the reaction was higher in APUPT cases (P = 0.007). There was strong association between APUPT patients and lacrimal sIgA (odds-ratio 18.61, P = 0.0001). ELISA test sensitivity was 84% and specificity 78% . Our data suggest that anti-T.gondii secretory IgA found in tears may become an important marker for active ocular toxoplasmosis.info:eu-repo/semantics/openAccessInstituto Oswaldo Cruz, Ministério da SaúdeMemórias do Instituto Oswaldo Cruz v.99 n.8 20042004-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762004000800013en10.1590/S0074-02762004000800013 |
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Lynch,Maria Isabel Cordeiro,Francisco Ferreira,Silvana Ximenes,Ricardo Oréfice,Fernando Malagueño,Elizabeth |
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Lynch,Maria Isabel Cordeiro,Francisco Ferreira,Silvana Ximenes,Ricardo Oréfice,Fernando Malagueño,Elizabeth Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondii |
author_facet |
Lynch,Maria Isabel Cordeiro,Francisco Ferreira,Silvana Ximenes,Ricardo Oréfice,Fernando Malagueño,Elizabeth |
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Lynch,Maria Isabel |
title |
Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondii |
title_short |
Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondii |
title_full |
Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondii |
title_fullStr |
Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondii |
title_full_unstemmed |
Lacrimal secretory IgA in active posterior uveitis induced by Toxoplasma gondii |
title_sort |
lacrimal secretory iga in active posterior uveitis induced by toxoplasma gondii |
description |
It is quite difficult to diagnose active toxoplasmosis in patients with ocular toxoplasmosis. Active posterior uveitis presumably due to Toxoplasma gondii infection (APUPT) is seldom produced during a prime-infection; hence most patients do not show high IgM antibodies. High levels of IgA have been described in active toxoplasmosis. The purpose of this study was to investigate possible association between APUPT and the specific anti-parasite sIgA in tears. The study was carried out as case-control. Tears of 25 clinically confirmed APUPT patients and 50 healthy control subjects were analyzed. All were IgG seropositive. Specific sIgA was determined by ELISA assay using T. gondii RH strain crude extract. Anti-T. gondii sIgA was found in 84% of the cases and in 22% of the control subjects. The intensity of the reaction was higher in APUPT cases (P = 0.007). There was strong association between APUPT patients and lacrimal sIgA (odds-ratio 18.61, P = 0.0001). ELISA test sensitivity was 84% and specificity 78% . Our data suggest that anti-T.gondii secretory IgA found in tears may become an important marker for active ocular toxoplasmosis. |
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Instituto Oswaldo Cruz, Ministério da Saúde |
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2004 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762004000800013 |
work_keys_str_mv |
AT lynchmariaisabel lacrimalsecretoryigainactiveposterioruveitisinducedbytoxoplasmagondii AT cordeirofrancisco lacrimalsecretoryigainactiveposterioruveitisinducedbytoxoplasmagondii AT ferreirasilvana lacrimalsecretoryigainactiveposterioruveitisinducedbytoxoplasmagondii AT ximenesricardo lacrimalsecretoryigainactiveposterioruveitisinducedbytoxoplasmagondii AT oreficefernando lacrimalsecretoryigainactiveposterioruveitisinducedbytoxoplasmagondii AT malaguenoelizabeth lacrimalsecretoryigainactiveposterioruveitisinducedbytoxoplasmagondii |
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