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Ubaldo O. Martín; Pía B. Machuca; Miguel A. Demonte; Liliana Contini (2008)
Publisher: Fundación Revista Medicina
Journal: Medicina (Buenos Aires)
Languages: English
Types: Article
Subjects: Toxocariasis, Anticuerpos, Eosinofilia, Perros, Toxocariasis, Antibodies, Eosinophilia, Dogs, Medicine, R, Immunologic diseases. Allergy, RC581-607, Infectious and parasitic diseases, RC109-216
La toxocariasis humana es una parasitosis de amplia distribución en el mundo, cuyo agente etiológico más importante es el Toxocara canis, parásito del perro. El hombre adquiere esta zoonosis mediante la ingesta de huevos infectivos; en el intestino delgado desarticulan sus envolturas y las larvas se liberan atravesando la mucosa, ubicándose en diversos tejidos. Los niños son la población de mayor riesgo. El diagnostico clínico es dificultoso. El test de ELISA usando antígenos de excreción-secreción de la larva, es la técnica de elección. Se estudiaron por esta técnica inmunoserológica 100 niños con diagnóstico presuntivo de toxocariasis y se revisaron posteriormente sus historias clínicas de Hospital. La técnica de diagnóstico fue estandarizada y validada en el laboratorio. Su aplicación permitió identificar dos poblaciones de niños: infectados (59) y no infectados (41). La eosinofilia fue más frecuente en la población infectada (100% vs. 85.2%, p = 0.017); no así la leucocitosis (p = 0.950). La fuerza de asociación de ambos parámetros fue mayor en la población positiva (R = 0.918). La dificultad respiratoria se presentó más frecuentemente en pacientes con ELISA positiva, considerados como infectados (p = 0.05). La edad promedio de los positivos fue significativamente mayor que la de los negativos (p = 0.009). Se halló eosinofilia en el 100% de los infectados y en el 85.2% de los no infectados. La tenencia de canes en los domicilios no fue significativamente mayor entre los casos positivos que entre los negativos (p = 0.53). Sería necesario investigar esta enfermedad en niños consultantes con sospecha clínica, y promover las medidas de prevención, diagnóstico temprano y su correcto tratamiento.
Human toxocariasis is a parasitic disease found worldwide. The most important etiological agent is Toxocara canis, a dog parasite. Humans are infected by the ingestion of their eggs; the eggs hatch in the small intestine and the larvae migrate through the capillaries, taking up residence in different tissues. Clinical manifestations are associated with mechanical and/or reaction damage caused by these parasites larvae. Clinical diagnosis is difficult. The method applied in this work is the demonstration of antibodies against the helminth in the blood of children, target host population of this parasitic disease. An ELISA test was performed using T. canis larval excretory-secretory products as antigen. A total of 100 children presumptively diagnosed of toxocariasis that had been derived from different services of the Regional Children’s Hospital for complementary studies, were included in the analysis. The test detected two different populations: infected (59) and non-infected (41). The statistical analysis showed a non significant association between infection and sex (p = 0.279). Infected subjects tended to be older than the non infected (p = 0.009). Eosinophilia was detected in 100% of seropositive children and in 85.2% of the seronegative. There was no significant association between infection and leucocytosis ( = 0.950). The association of these two parameters was significantly higher among infected patients (R = 0.918). Respiratory symptoms and signs were more frequently detected in the positive population (p = 0.05). Dogs tenancy was as frequent among infected as in the non infected homes (p = 0.53). According to these results, prevention, early diagnosis and opportune treatment for toxocariasis should be considered as prioritary health activities in this region.

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