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Rev. Inst. Med. Trop. Säo Paulo ; 50(5): 273-278, Sept.-Oct. 2008. tab
Article in English | LILACS | ID: lil-495762

ABSTRACT

During a health survey in a primary school from the district of Carabayllo (North of Lima, Peru), 200 schoolchildren (96 male and 104 female between five to 12 years old) were randomly selected and divided in two groups (as positive or negative group), according to the serologic result of the Toxocara ELISA test from a total population of 646 schoolchildren. All children were analyzed by hematologic tests to determinate the frequency of eosinophilia and leukocytosis. Additionally, all clinical and epidemiological data were also analyzed to determine their association with toxocariasis. From group of children with positive serology, 40 percent had some type of eosinophilia in contrast to 19 percent of children with negative serology, and their association was statistically significant (OR = 2.84, p < 0.001). From all signs and symptoms evaluated, only 'dry cough' was more frequent and statistically significant in the positive serology group (OR = 2.79, p < 0.001). Almost all risk factors evaluated were highly frequent and statistically associated to the positive serology. In conclusion, the presence of eosinophilia and the risk factors evaluated in this population were frequently associated to human toxocariasis.


Durante estudo epidemiológico em escola primária do Distrito de Carabayllo (norte de Lima, Peru), 200 crianças (96 do sexo masculino e 104 do feminino, entre cinco e 12 anos de idade) foram selecionadas ao acaso e divididas em dois grupos (grupo positivo e grupo negativo) de acordo com os resultados de teste de ELISA para Toxocara em população total de 646 escolares. Todas as crianças foram analisadas por testes hematológicos para determinar a freqüência de eosinofilia e leucocitose. Adicionalmente, os dados clínicos e epidemiológicos foram analisados para determinar associação com toxocaríase. No grupo de crianças com sorologia positiva 40 por cento tinham eosinofilia em contraste com 19 por cento de crianças com sorologia negativa e esta associação foi estatisticamente.significante (OR = 2,84, p < 0,001). De todos os sinais e sintomas avaliados, somente tosse seca foi mais freqüente e estatisticamente significante no grupo de sorologia positiva (OR = 2,79, p < 0,001). Quase todos os fatores de risco avaliados foram de alta freqüência e estatisticamente associados à sorologia positiva. Em conclusão, a presença de eosinofilia e dos fatores de risco avaliados nesta população foram frequentemente associados à toxocaríase humana.


Subject(s)
Animals , Cats , Child , Child, Preschool , Dogs , Female , Humans , Male , Eosinophilia/epidemiology , Intestinal Diseases, Parasitic/epidemiology , Toxocariasis/epidemiology , Antibodies, Helminth/blood , Enzyme-Linked Immunosorbent Assay , Eosinophilia/diagnosis , Eosinophilia/parasitology , Feces/parasitology , Health Surveys , Immunoglobulin G/blood , Intestinal Diseases, Parasitic/diagnosis , Intestinal Diseases, Parasitic/parasitology , Prevalence , Peru/epidemiology , Risk Factors , Toxocara/immunology , Toxocariasis/diagnosis
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