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Spatial and Temporal Epidemiology of Dirofilaria immitis Infection in dogs in Relation to Weather Parameters

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Title: Spatial and Temporal Epidemiology of Dirofilaria immitis Infection in dogs in Relation to Weather Parameters
Author: Forrest, Russell Othmer
Department: Department of Population Medicine
Program: Population Medicine
Advisor: Berke, Olaf
Abstract: Heartworm development units (HDU) are commonly used as the main predictor for the prevalence of heartworm infection in dogs. The HDU is based on scientific knowledge regarding the temperature conditions necessary for the larval development of the parasite Dirofilaria immitis and its vector species activity range. However, HDUs are not readily available, and other predictors for D. immitis infection may be better at describing its prevalence in the dog population. Monthly heartworm antigen test results for dogs in Ontario from 2014 to 2019 were subjected to time series linear regression. Further, annual heartworm antigen test results for dogs in Canada and the United States at the provincial/state level for the year 2018 were analysed using Generalized Linear Mixed Models. Average monthly and annual ambient temperature was shown to be a better predictor for the prevalence of heartworm infection in dogs than monthly and annual HDUs using temporal and spatial models.
URI: https://hdl.handle.net/10214/21271
Date: 2020-09
Rights: Attribution-NonCommercial-ShareAlike 4.0 International
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Attribution-NonCommercial-ShareAlike 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International