Periódicos Brasileiros em Medicina Veterinária e Zootecnia

p. 01-07

Spatial distribution of seropositive dogs to Leptospira spp. and evaluation of Leptospirosis risk factors using a decision tree

Bier, DanieleToledo Martins-Bedê, FláviaMidori Morikawa, VivienSabrina Ullmann, LeilaKikuti, MarianaLangoni, HelioJosé Canever, RicardoWelker Biondo, AlexanderBeltrão Molento, Marcelo

Background: Leptospirosis is an important zoonotic disease associated with poor areas of urban settings of developing countries and early diagnosis and prompt treatment may prevent disease. Although rodents are reportedly considered the main reservoirs of leptospirosis, dogs may develop the disease, may become asymptomatic carriers and may be used as sentinels for disease epidemiology. The use of Geographical Information Systems (GIS) combined with spatial analysis techniques allows the mapping of the disease and the identifi cation and assessment of health risk factors. Besides the use of GIS and spatial analysis, the technique of data mining, decision tree, can provide a great potential to fi nd a pattern in the behavior of the variables that determine the occurrence of leptospirosis. The objective of the present study was to apply Geographical Information Systems and data prospection (decision tree) to evaluate the risk factors for canine leptospirosis in an area of Curitiba, PR.Materials, Methods & Results: The present study was performed on the Vila Pantanal, a urban poor community in the city of Curitiba. A total of 287 dog blood samples were randomly obtained house-by-house in a two-day sampling on January 2010. In addition, a questionnaire was applied to owners at the time of sampling. Geographical coordinates related to each household of tested dog were obtained us

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