Seroepidemiology of human toxoplasmosis in Chile
Autor(a) principal: | |
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Data de Publicação: | 1996 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista do Instituto de Medicina Tropical de São Paulo |
Texto Completo: | https://www.revistas.usp.br/rimtsp/article/view/29415 |
Resumo: | A series of already published and unpublished seroepidemiological surveys for toxoplasmosis, carried out in Chile in 1982-1994, is reviewed, expanded and analyzed. The surveys included 76,317 apparently healthy individuals of different ages (0.57% of the country's total population), from 309 urban and rural-periurban localities. Urban groups were integrated by blood donors, delivering mothers and middle grade schoolchildren, while rural-periurban individuals corresponded to unselected family groups. Blood samples were collected in filter paper. The presence of antibodies to Toxoplasma gondii was determined by the indirect hemagglutination test (IHAT), titers >; 16 were considered positive. The test resulted positive in 28,124 (36.9%) of the surveyed people. Two hundred and six (0.3%) individuals presented IHAT titers >; 1000, probably corresponding to acute or reactivated infections. A progressive increase of positive IHAT from northern to southern regions of the country was noted, phenomenom probably related to geographical conditions and to a higher production and consumption of different types of meat in the latter regions. It is postulated that ingestion of T. gondii cysts by humans is epidemiologically as important as ingestion of oocysts. The results presented stress the epidemiological importance of toxoplasmosis in humans, and warn about eventual implications in immunocompromised patients and in transplacental transmission, organ transplants and transfusions. |
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Seroepidemiology of human toxoplasmosis in Chile Seroepidemiología de la toxoplasmosis en Chile ToxoplasmosisSeroepidemiologyChile A series of already published and unpublished seroepidemiological surveys for toxoplasmosis, carried out in Chile in 1982-1994, is reviewed, expanded and analyzed. The surveys included 76,317 apparently healthy individuals of different ages (0.57% of the country's total population), from 309 urban and rural-periurban localities. Urban groups were integrated by blood donors, delivering mothers and middle grade schoolchildren, while rural-periurban individuals corresponded to unselected family groups. Blood samples were collected in filter paper. The presence of antibodies to Toxoplasma gondii was determined by the indirect hemagglutination test (IHAT), titers >; 16 were considered positive. The test resulted positive in 28,124 (36.9%) of the surveyed people. Two hundred and six (0.3%) individuals presented IHAT titers >; 1000, probably corresponding to acute or reactivated infections. A progressive increase of positive IHAT from northern to southern regions of the country was noted, phenomenom probably related to geographical conditions and to a higher production and consumption of different types of meat in the latter regions. It is postulated that ingestion of T. gondii cysts by humans is epidemiologically as important as ingestion of oocysts. The results presented stress the epidemiological importance of toxoplasmosis in humans, and warn about eventual implications in immunocompromised patients and in transplacental transmission, organ transplants and transfusions. En este trabajo se revisa, se amplía y se analiza en conjunto una serie de encuestas seroepidemiológicas sobre toxoplasmosis efectuadas en Chile entre 1982 y 1994, utilizando la reacción de hemaglutinación indirecta (RHAI). El estudio incluyó 76.317 personas aparentemente sanas de diferentes edades (0,57% de la problación total del país), procedentes de 309 localidades urbanas y rural-periurbanas. Los grupos urbanos estuvieron constituídos por donantes de sangre, parturientas y escolares del nivel medio de la enseñanza básica, mientras que los habitantes rural-periurbanos correspondieron a grupos familiares no seleccionados. Las muestras de sangre fueron recolectadas en papel filtro, y fueron consideradas positivas las RHAI con títulos >; 16. La RHAI resultó positiva en un total de 28.124 (36,9%) de las personas encuestadas, encontrándose títulos >; 1000 en 206 (0,3%) individuos, los que probablemente correspondieron a infecciones agudas o reactivadas. Hubo un progresivo incremento de las RHAI positivas desde las regiones del extremo norte hacia las regiones del extremo sur del país, lo que podría relacionarse con una mayor humedad ambiental y con una mayor producción y consumo de diferentes tipos de carne en estas últimas. Los resultados presentados destacan la importancia de la toxoplasmosis en el hombre y alertan sobre eventuales implicancias en pacientes inmunocomprometidos, en la transmisión transplacentaria, transplantes de órganos y transfusiones. Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo1996-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/rimtsp/article/view/29415Revista do Instituto de Medicina Tropical de São Paulo; Vol. 38 No. 6 (1996); 431-435 Revista do Instituto de Medicina Tropical de São Paulo; Vol. 38 Núm. 6 (1996); 431-435 Revista do Instituto de Medicina Tropical de São Paulo; v. 38 n. 6 (1996); 431-435 1678-99460036-4665reponame:Revista do Instituto de Medicina Tropical de São Pauloinstname:Instituto de Medicina Tropical (IMT)instacron:IMTenghttps://www.revistas.usp.br/rimtsp/article/view/29415/31275Copyright (c) 2018 Revista do Instituto de Medicina Tropical de São Pauloinfo:eu-repo/semantics/openAccessContreras, Maria del C.Schenone, HugoSalinas, PatriciaSandoval, LeaRojas, AntonioVillarroel, FernandoSolis, Fresia2012-07-02T01:44:32Zoai:revistas.usp.br:article/29415Revistahttp://www.revistas.usp.br/rimtsp/indexPUBhttps://www.revistas.usp.br/rimtsp/oai||revimtsp@usp.br1678-99460036-4665opendoar:2022-12-13T16:51:09.884645Revista do Instituto de Medicina Tropical de São Paulo - Instituto de Medicina Tropical (IMT)true |
dc.title.none.fl_str_mv |
Seroepidemiology of human toxoplasmosis in Chile Seroepidemiología de la toxoplasmosis en Chile |
title |
Seroepidemiology of human toxoplasmosis in Chile |
spellingShingle |
Seroepidemiology of human toxoplasmosis in Chile Contreras, Maria del C. Toxoplasmosis Seroepidemiology Chile |
title_short |
Seroepidemiology of human toxoplasmosis in Chile |
title_full |
Seroepidemiology of human toxoplasmosis in Chile |
title_fullStr |
Seroepidemiology of human toxoplasmosis in Chile |
title_full_unstemmed |
Seroepidemiology of human toxoplasmosis in Chile |
title_sort |
Seroepidemiology of human toxoplasmosis in Chile |
author |
Contreras, Maria del C. |
author_facet |
Contreras, Maria del C. Schenone, Hugo Salinas, Patricia Sandoval, Lea Rojas, Antonio Villarroel, Fernando Solis, Fresia |
author_role |
author |
author2 |
Schenone, Hugo Salinas, Patricia Sandoval, Lea Rojas, Antonio Villarroel, Fernando Solis, Fresia |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Contreras, Maria del C. Schenone, Hugo Salinas, Patricia Sandoval, Lea Rojas, Antonio Villarroel, Fernando Solis, Fresia |
dc.subject.por.fl_str_mv |
Toxoplasmosis Seroepidemiology Chile |
topic |
Toxoplasmosis Seroepidemiology Chile |
description |
A series of already published and unpublished seroepidemiological surveys for toxoplasmosis, carried out in Chile in 1982-1994, is reviewed, expanded and analyzed. The surveys included 76,317 apparently healthy individuals of different ages (0.57% of the country's total population), from 309 urban and rural-periurban localities. Urban groups were integrated by blood donors, delivering mothers and middle grade schoolchildren, while rural-periurban individuals corresponded to unselected family groups. Blood samples were collected in filter paper. The presence of antibodies to Toxoplasma gondii was determined by the indirect hemagglutination test (IHAT), titers >; 16 were considered positive. The test resulted positive in 28,124 (36.9%) of the surveyed people. Two hundred and six (0.3%) individuals presented IHAT titers >; 1000, probably corresponding to acute or reactivated infections. A progressive increase of positive IHAT from northern to southern regions of the country was noted, phenomenom probably related to geographical conditions and to a higher production and consumption of different types of meat in the latter regions. It is postulated that ingestion of T. gondii cysts by humans is epidemiologically as important as ingestion of oocysts. The results presented stress the epidemiological importance of toxoplasmosis in humans, and warn about eventual implications in immunocompromised patients and in transplacental transmission, organ transplants and transfusions. |
publishDate |
1996 |
dc.date.none.fl_str_mv |
1996-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/rimtsp/article/view/29415 |
url |
https://www.revistas.usp.br/rimtsp/article/view/29415 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/rimtsp/article/view/29415/31275 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2018 Revista do Instituto de Medicina Tropical de São Paulo info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2018 Revista do Instituto de Medicina Tropical de São Paulo |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo |
publisher.none.fl_str_mv |
Universidade de São Paulo. Instituto de Medicina Tropical de São Paulo |
dc.source.none.fl_str_mv |
Revista do Instituto de Medicina Tropical de São Paulo; Vol. 38 No. 6 (1996); 431-435 Revista do Instituto de Medicina Tropical de São Paulo; Vol. 38 Núm. 6 (1996); 431-435 Revista do Instituto de Medicina Tropical de São Paulo; v. 38 n. 6 (1996); 431-435 1678-9946 0036-4665 reponame:Revista do Instituto de Medicina Tropical de São Paulo instname:Instituto de Medicina Tropical (IMT) instacron:IMT |
instname_str |
Instituto de Medicina Tropical (IMT) |
instacron_str |
IMT |
institution |
IMT |
reponame_str |
Revista do Instituto de Medicina Tropical de São Paulo |
collection |
Revista do Instituto de Medicina Tropical de São Paulo |
repository.name.fl_str_mv |
Revista do Instituto de Medicina Tropical de São Paulo - Instituto de Medicina Tropical (IMT) |
repository.mail.fl_str_mv |
||revimtsp@usp.br |
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1798951642315358208 |