Prevalence of Dirofilaria immitis in dogs from Barcelona: Validation of a geospatial prediction model

•The current canine prevalence of heartworm was 2.4% in the province of Barcelona.•Infected dogs were located in districts close to parks in the urban area of Barcelona.•D. immitis is unevenly distributed and associated to areas with high risk of infection.•GIS can be used to determine the need of implementation of prophylactic protocols.