distribuição espacial da infecção por ascaris lumbricoides spatial distribution of ascaris lumbricoides infection
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2002
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Abstract
OBJETIVO: Estimar áreas de risco para a ocorrência de carga parasitária produzida pelo Ascaris lumbricoides, por meio da utilização de técnicas de geoprocessamento e análise geoestatística. MÉTODOS: Foram selecionados 19 setores censitários para a realização do inquérito copro-parasitológico e domiciliar na localidade de Parque Fluminense, no município de Duque de Caxias, RJ. Foram amostradas e plotadas no centróide de seu respectivo domicílio 1.664 crianças com idade entre 1 e 9 anos. As técnicas de geoestatística permitiram a análise exploratória espacial, variografia e krigagem ordinária. A análise estatística inclui teste "t" de Student, odds ratio e intervalos de confiança de 95%. RESULTADOS: A prevalência encontrada para A. lumbricoides foi de 27,5%. A renda familiar, o nível de escolaridade da dona de casa e as condições peridomiciliares foram identificados como fatores significativamente associados à ocorrência de ascaríase. Um modelo de semivariograma isotrópico esférico com alcance de 150 metros, contribuição de 0,45 e efeito pepita de 0,55 foi empregado na krigagem ordinária. CONCLUSÕES: A continuidade espacial de aproximadamente 150 metros corrobora a influência do peridomicílio na ascaríase. Pela krigagem ordinária, foi possível estimar a ocorrência da doença em toda a área de estudo e construir um mapa de risco.
OBJECTIVE: To estimate risk areas for Ascaris lumbricoides parasitic overload, using geoprocessing and geostatistic methods of analysis. METHODS: A coproparasitologic and domiciliary survey was conducted in 19 selected census districts of the state of Rio de Janeiro, Brazil. A sample of 1,664 children aged between 1--9 years was selected and plotted in their own home' centroid. Geostatistics techniques allowed spatial exploratory analysis, variographic study, and ordinary kriging. Student t-test, odds ratio and confidence intervals were used in the statistical analysis. RESULTS: A prevalence of 27.5% was found for A. lumbricoides. Household income, housewife's education level and peridomiciliary conditions were identified as significantly associated factors to the occurrence of ascariasis. An isotropic spherical semivariogram model with 150-m reach, contribution of 0.45 and nugget effect of 0.55 was employed in ordinary kriging. CONCLUSIONS: Peridomiciliary impact on ascariasis is confirmed by a spatial continuity of 150 m. Disease occurrence could be estimated in the study area and a risk map elaborated using ordinary kriging.
OBJECTIVE: To estimate risk areas for Ascaris lumbricoides parasitic overload, using geoprocessing and geostatistic methods of analysis. METHODS: A coproparasitologic and domiciliary survey was conducted in 19 selected census districts of the state of Rio de Janeiro, Brazil. A sample of 1,664 children aged between 1--9 years was selected and plotted in their own home' centroid. Geostatistics techniques allowed spatial exploratory analysis, variographic study, and ordinary kriging. Student t-test, odds ratio and confidence intervals were used in the statistical analysis. RESULTS: A prevalence of 27.5% was found for A. lumbricoides. Household income, housewife's education level and peridomiciliary conditions were identified as significantly associated factors to the occurrence of ascariasis. An isotropic spherical semivariogram model with 150-m reach, contribution of 0.45 and nugget effect of 0.55 was employed in ordinary kriging. CONCLUSIONS: Peridomiciliary impact on ascariasis is confirmed by a spatial continuity of 150 m. Disease occurrence could be estimated in the study area and a risk map elaborated using ordinary kriging.
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campos2002revistadistribuio
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| Authors | ;Mônica Rodrigues Campos;Luis Iván Ortiz Valencia;Bruno de Paula Menezes Drumond Fortes;Ricardo Cerqueira Campos Braga;Roberto de Andrade Medronho |
| Journal | proceedings - 2016 3rd international conference on information technology, computer, and electrical engineering, icitacee 2016 |
| Year | 2002 |
| DOI |
10.1590/S0034-89102002000100011
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