Cited by 9Parasitic Diseases Research and TreatmentVector-borne infectious diseasesVector-Borne Animal Diseases

Assessment of the monthly risk of dirofilariosis infection in Europe and its projection to 2100 under climate change from a One Health perspective

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Rodríguez-Escolar, Iván, Balmori-de la Puente, Alfonso, Infante González-Mohino, Elena, Collado-Cuadrado, Manuel, Carretón, Elena, Montoya-Alonso, José Alberto, Morchón, Rodrigo·2025·Parasites & Vectors

Abstract

BACKGROUND: Dirofilariosis is a vector-borne zoonotic disease primarily caused by the parasitic nematodes Dirofilaria immitis and D. repens. In Europe, the disease has expanded from traditionally endemic southern countries to central and northeastern regions, many of which are now also considered endemic. This study aimed to generate infection risk maps for dirofilariosis in Europe using ecoinformatic tools, at both annual and monthly scales, to serve as a prevention tool and contribute to more effective control of the disease, as well as helping to stop its spread. METHODS: A habitat suitability map was generated for the two most important and widely distributed culicid vectors in Europe (Culex pipiens and Aedes albopictus). This map was weighted with the number of D. immitis generations in the vectors, both annually and monthly. The resulting annual risk map was validated with georeferenced records of D. immitis- and D. repens-infected dogs and cats. In addition, a future habitat suitability projection for both vector species was performed for the year 2100 under the Representative Concentration Pathway (RCP) 8.5 climate change scenario. RESULTS: Dirofilariosis infection risk in Europe is highest in southern countries, where favorable climatic conditions and increased vector activity coincide. Central Europe showed medium- to high-risk values, while northern latitudes exhibited low or very low risk, correlating with lower average temperatures. Of the geolocated infected animals, 35.9%, 51% and 13% were located in high-, medium-, or low-risk areas, respectively. Infection risk appears to be very limited during winter, restricted mainly to Mediterranean coastal areas, the Canary Islands (Spain), and Madeira (Portugal); while in spring/summer it becomes high in these places and moderate across other parts of the range such us central and northeastern Europe. The 2100 projection predicts a 161.6% increase in habitat suitability for the vectors, particularly in northeastern regions, high-altitude areas, and northernmost countries. CONCLUSIONS: The combined use of habitat suitability for Culex pipiens and Aedes albopictus and the number of Dirofilaria spp. generations allowed the development of a more comprehensive color-coded dirofilariosis infection risk map than previously available. Monthly infection risk maps across Europe could help guide targeted prevention and control measures, disrupt disease establishment in specific areas and seasons, and raise awareness about infection risks in both animals and humans.

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  • In the Balearic Islands, insularity, host density, and persistence of wetland environments may contribute to sustained transmission.

    “Similarly, in the Balearic Islands, insularity, host density, and the persistence of wetland environments may contribute to sustained transmission, in agreement with recent seroprevalence studies from the area (3, 9, 25).”

    From Deciphering the socio-environmental factors associated with realized heartworm transmission risk in dogs from Portugal and Spain (2026) · cites this paper as [3]

    The Results (Annual infection risk map; page not provided) identify the Balearic Islands as a high-risk area, and the Discussion links European risk to water sources and human activity. The paper does not specifically attribute sustained transmission in the Balearics to insularity, host density, or persistent wetlands, nor does it report Balearic seroprevalence findings. (LLM, conf=0.84)

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  • The interpretation is consistent with climate change projections for southern Europe, which predict increasing aridification and may favor the concentration of transmission in specific ecological niches where high temperatures and artificial water sources coexist.

    “This interpretation is also consistent with climate change projections for southern Europe, which predict increasing aridification and may favor the concentration of transmission in specific ecological niches where high temperatures and artificial water sources coexist (3).”

    From Deciphering the socio-environmental factors associated with realized heartworm transmission risk in dogs from Portugal and Spain (2026) · cites this paper as [3]

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Research works printed but not linked: 1

  1. [67]Kosić SL, Simin S, Lalosevic S, Lalošević V, Lalošević D, Kuruca L, Nikolć S, Nerac D. Updating the prevalence of canine dirofilariosis in pet dogs in Novi Sad, Vojvodina, Serbia. Contemporary Agriculture. 2014;63:487–493. UDC: 636.09:569.74.

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Authors
Rodríguez-Escolar, I., Balmori-de la Puente, A., Infante González-Mohino, E., Collado-Cuadrado, M., Carretón, E., Montoya-Alonso, J. A., & Morchón, R.
Affiliations
  • Universidad de Salamanca (ES)
  • Universidad de Las Palmas de Gran Canaria (ES)
Corresponding author
Morchón, Rodrigo
Venue
Parasites & Vectors
Published
2025-11-27
Volume
18
Issue
1
Pages
516-516
ISSN
1756-3305 (ISSN-L)
OpenAlex
W4416765524
Cited by
9
References
82
Citations by year
2026: 9
FWCI
6.92
Type
journal article
Language
en
Open access
Locations
  • Parasites & Vectors (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • Acceda (Universidad de Las Palmas de Gran Canaria) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Parasitic Diseases Research and Treatment
  • Life Sciences › Immunology and Microbiology › Parasitology › Vector-borne infectious diseases
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Vector-Borne Animal Diseases
Keywords
dirofilariasis, Dirofilaria immitis, Dirofilaria repens, infection risk mapping, climate change projections, Culex pipiens, Aedes albopictus, habitat suitability, One Health, RCP8.5, disease spread, dogs and cats, Europe, Mediterranean coast
MeSH terms
One Health, Aedes, Animals, Cat Diseases, Cats, Culex, Dirofilaria immitis, Dirofilariasis, Dog Diseases, Dogs, Europe, Insect Vectors, Ecosystem, Risk Assessment, Climate Change, Dirofilaria repens

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