Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns

Autores
Vezzani, Dario; Carbajo, Anibal Eduardo; Fontanarrosa, María F.; Scodellaro, Carla F.; Basabe, Julia; Cangiano, Griselda; Eiras, Diego Fernando
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This study was aimed at understanding some aspects of the canine heartworm epidemiology in the southern distribution limit of the parasite in South America. With this objective, 19,298 blood samples of owned dogs from 65 localities of 13 municipalities of Buenos Aires Province were tested for Dirofilaria immitis circulating microfilariae and/or female antigens. The overall heartworm prevalence was 1.63% by microhematocrit tube technique (n = 19,136), 3.65% by modified Knott (n = 713), and 14.41% by antigen test kit (n = 118). Microfilaremic dogs showed a median of 1933 microfilariae per millilitre (q1 = 375, q3 = 5625, n = 100). Male dogs belonging to breeds of short hair and large size recorded significantly higher prevalences than the other categories. Also, the prevalence increased significantly with the age and only dogs younger than 12 months were not found infected. A clear decreasing trend of the annual prevalence was observed during the whole study period, from 3.91% in 2001 to 1.17% in 2006. D. immitis-infected dogs were detected in 32 localities of 9 municipalities (prevalence range: 0.2-6.7%). Generalized linear models were used to assess associations between heartworm prevalence and environmental variables. The resulting significant models were univariate and included variables related with soil cover and human population density. The best model predicted maximum heartworm prevalences around middle values of bare soil cover, and lower at high and low covers. According to our analyses, canine heartworm infection in urban temperate Argentina could be described as relatively low, endemic, and spatially heterogeneous. Host and environmental factors affecting heartworm transmission at local level were identified and discussed.
Fil: Vezzani, Dario. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Carbajo, Anibal Eduardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fontanarrosa, María F.. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Scodellaro, Carla F.. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Basabe, Julia. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Cangiano, Griselda. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Eiras, Diego Fernando. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Epizootiología y Salud Pública; Argentina. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Materia
ARGENTINA
DIROFILARIA IMMITIS
DOGS
HEARTWORM PREVALENCE
NEMATODES
SPATIAL ANALYSIS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/98709
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/98709
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patternsVezzani, DarioCarbajo, Anibal EduardoFontanarrosa, María F.Scodellaro, Carla F.Basabe, JuliaCangiano, GriseldaEiras, Diego FernandoARGENTINADIROFILARIA IMMITISDOGSHEARTWORM PREVALENCENEMATODESSPATIAL ANALYSIShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1This study was aimed at understanding some aspects of the canine heartworm epidemiology in the southern distribution limit of the parasite in South America. With this objective, 19,298 blood samples of owned dogs from 65 localities of 13 municipalities of Buenos Aires Province were tested for Dirofilaria immitis circulating microfilariae and/or female antigens. The overall heartworm prevalence was 1.63% by microhematocrit tube technique (n = 19,136), 3.65% by modified Knott (n = 713), and 14.41% by antigen test kit (n = 118). Microfilaremic dogs showed a median of 1933 microfilariae per millilitre (q1 = 375, q3 = 5625, n = 100). Male dogs belonging to breeds of short hair and large size recorded significantly higher prevalences than the other categories. Also, the prevalence increased significantly with the age and only dogs younger than 12 months were not found infected. A clear decreasing trend of the annual prevalence was observed during the whole study period, from 3.91% in 2001 to 1.17% in 2006. D. immitis-infected dogs were detected in 32 localities of 9 municipalities (prevalence range: 0.2-6.7%). Generalized linear models were used to assess associations between heartworm prevalence and environmental variables. The resulting significant models were univariate and included variables related with soil cover and human population density. The best model predicted maximum heartworm prevalences around middle values of bare soil cover, and lower at high and low covers. According to our analyses, canine heartworm infection in urban temperate Argentina could be described as relatively low, endemic, and spatially heterogeneous. Host and environmental factors affecting heartworm transmission at local level were identified and discussed.Fil: Vezzani, Dario. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Carbajo, Anibal Eduardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fontanarrosa, María F.. Laboratorio DIAP Diagnostico en Animales Pequeños; ArgentinaFil: Scodellaro, Carla F.. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina. Laboratorio DIAP Diagnostico en Animales Pequeños; ArgentinaFil: Basabe, Julia. Laboratorio DIAP Diagnostico en Animales Pequeños; ArgentinaFil: Cangiano, Griselda. Laboratorio DIAP Diagnostico en Animales Pequeños; ArgentinaFil: Eiras, Diego Fernando. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Epizootiología y Salud Pública; Argentina. Laboratorio DIAP Diagnostico en Animales Pequeños; ArgentinaElsevier Science2011-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/98709Vezzani, Dario; Carbajo, Anibal Eduardo; Fontanarrosa, María F.; Scodellaro, Carla F.; Basabe, Julia; et al.; Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns; Elsevier Science; Veterinary Parasitology; 176; 2-3; 3-2011; 240-2490304-4017CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304401710006114info:eu-repo/semantics/altIdentifier/doi/10.1016/j.vetpar.2010.10.046info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:52:01Zoai:ri.conicet.gov.ar:11336/98709instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:52:01.671CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
title Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
spellingShingle Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
Vezzani, Dario
ARGENTINA
DIROFILARIA IMMITIS
DOGS
HEARTWORM PREVALENCE
NEMATODES
SPATIAL ANALYSIS
title_short Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
title_full Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
title_fullStr Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
title_full_unstemmed Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
title_sort Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns
dc.creator.none.fl_str_mv Vezzani, Dario
Carbajo, Anibal Eduardo
Fontanarrosa, María F.
Scodellaro, Carla F.
Basabe, Julia
Cangiano, Griselda
Eiras, Diego Fernando
author Vezzani, Dario
author_facet Vezzani, Dario
Carbajo, Anibal Eduardo
Fontanarrosa, María F.
Scodellaro, Carla F.
Basabe, Julia
Cangiano, Griselda
Eiras, Diego Fernando
author_role author
author2 Carbajo, Anibal Eduardo
Fontanarrosa, María F.
Scodellaro, Carla F.
Basabe, Julia
Cangiano, Griselda
Eiras, Diego Fernando
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv ARGENTINA
DIROFILARIA IMMITIS
DOGS
HEARTWORM PREVALENCE
NEMATODES
SPATIAL ANALYSIS
topic ARGENTINA
DIROFILARIA IMMITIS
DOGS
HEARTWORM PREVALENCE
NEMATODES
SPATIAL ANALYSIS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This study was aimed at understanding some aspects of the canine heartworm epidemiology in the southern distribution limit of the parasite in South America. With this objective, 19,298 blood samples of owned dogs from 65 localities of 13 municipalities of Buenos Aires Province were tested for Dirofilaria immitis circulating microfilariae and/or female antigens. The overall heartworm prevalence was 1.63% by microhematocrit tube technique (n = 19,136), 3.65% by modified Knott (n = 713), and 14.41% by antigen test kit (n = 118). Microfilaremic dogs showed a median of 1933 microfilariae per millilitre (q1 = 375, q3 = 5625, n = 100). Male dogs belonging to breeds of short hair and large size recorded significantly higher prevalences than the other categories. Also, the prevalence increased significantly with the age and only dogs younger than 12 months were not found infected. A clear decreasing trend of the annual prevalence was observed during the whole study period, from 3.91% in 2001 to 1.17% in 2006. D. immitis-infected dogs were detected in 32 localities of 9 municipalities (prevalence range: 0.2-6.7%). Generalized linear models were used to assess associations between heartworm prevalence and environmental variables. The resulting significant models were univariate and included variables related with soil cover and human population density. The best model predicted maximum heartworm prevalences around middle values of bare soil cover, and lower at high and low covers. According to our analyses, canine heartworm infection in urban temperate Argentina could be described as relatively low, endemic, and spatially heterogeneous. Host and environmental factors affecting heartworm transmission at local level were identified and discussed.
Fil: Vezzani, Dario. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Carbajo, Anibal Eduardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fontanarrosa, María F.. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Scodellaro, Carla F.. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Basabe, Julia. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Cangiano, Griselda. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
Fil: Eiras, Diego Fernando. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Departamento de Epizootiología y Salud Pública; Argentina. Laboratorio DIAP Diagnostico en Animales Pequeños; Argentina
description This study was aimed at understanding some aspects of the canine heartworm epidemiology in the southern distribution limit of the parasite in South America. With this objective, 19,298 blood samples of owned dogs from 65 localities of 13 municipalities of Buenos Aires Province were tested for Dirofilaria immitis circulating microfilariae and/or female antigens. The overall heartworm prevalence was 1.63% by microhematocrit tube technique (n = 19,136), 3.65% by modified Knott (n = 713), and 14.41% by antigen test kit (n = 118). Microfilaremic dogs showed a median of 1933 microfilariae per millilitre (q1 = 375, q3 = 5625, n = 100). Male dogs belonging to breeds of short hair and large size recorded significantly higher prevalences than the other categories. Also, the prevalence increased significantly with the age and only dogs younger than 12 months were not found infected. A clear decreasing trend of the annual prevalence was observed during the whole study period, from 3.91% in 2001 to 1.17% in 2006. D. immitis-infected dogs were detected in 32 localities of 9 municipalities (prevalence range: 0.2-6.7%). Generalized linear models were used to assess associations between heartworm prevalence and environmental variables. The resulting significant models were univariate and included variables related with soil cover and human population density. The best model predicted maximum heartworm prevalences around middle values of bare soil cover, and lower at high and low covers. According to our analyses, canine heartworm infection in urban temperate Argentina could be described as relatively low, endemic, and spatially heterogeneous. Host and environmental factors affecting heartworm transmission at local level were identified and discussed.
publishDate 2011
dc.date.none.fl_str_mv 2011-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/98709
Vezzani, Dario; Carbajo, Anibal Eduardo; Fontanarrosa, María F.; Scodellaro, Carla F.; Basabe, Julia; et al.; Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns; Elsevier Science; Veterinary Parasitology; 176; 2-3; 3-2011; 240-249
0304-4017
CONICET Digital
CONICET
url http://hdl.handle.net/11336/98709
identifier_str_mv Vezzani, Dario; Carbajo, Anibal Eduardo; Fontanarrosa, María F.; Scodellaro, Carla F.; Basabe, Julia; et al.; Epidemiology of canine heartworm in its southern distribution limit in South America: Risk factors, inter-annual trend and spatial patterns; Elsevier Science; Veterinary Parasitology; 176; 2-3; 3-2011; 240-249
0304-4017
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304401710006114
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.vetpar.2010.10.046
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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