Cited by 41Virology and Viral DiseasesAnimal Virus Infections StudiesAnimal Disease Management and Epidemiology

Clinical and molecular investigation of a canine distemper outbreak and vector-borne infections in a group of rescue dogs imported from Hungary to Switzerland

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Willi, Barbara, Spiri, Andrea M., Meli, Marina L., Grimm, Felix, Beatrice, Laura, Riond, Barbara, Bley, Tim, Jordi, Rolf +2 more·2015·BMC Veterinary Research

Abstract

BACKGROUND: Canine distemper virus (CDV) is a major pathogen of dogs and wild carnivores worldwide. In Switzerland, distemper in domestic dogs is rarely reported. In recent years, the import of dogs from Eastern Europe to Switzerland has steadily increased. In the present study, we describe a distemper outbreak in 15 rescue dogs that were imported from Hungary to Switzerland by an animal welfare organisation. The data on vaccination and medical history were recorded (14 dogs), and the samples were collected to investigate CDV and vector-borne infections (13 dogs) and canine parvovirus infection (12 dogs). The dogs were monitored for six months. RESULTS: One dog was euthanised directly after import. Thirteen dogs showed clinical signs after arrival, i.e., diarrhoea (57 %), coughing (43 %) and nasal and/or ocular discharge (21 %); radiographic findings that were compatible with bronchopneumonia were present in four dogs. CDV infection was diagnosed in 11 dogs (85 %); 10 dogs (91 %) tested PCR-positive in conjunctival swabs. Vector-borne infections (Babesia spp., Leishmania infantum, Dirofilaria immitis) were found in 4 dogs (31 %). Three dogs were hospitalized, and six dogs received ambulatory therapy for up to two months until recovery. None of the dogs developed neurological disease. CDV shedding was detected for a period of up to four months. Because dogs were put under strict quarantine until CDV shedding ceased, CDV did not spread to any other dogs. The CDV isolates showed 99 % sequence identity in the HA gene among each other and belonged to the Arctic-like lineage of CDV. CONCLUSIONS: The present study highlights the imminent risks of spreading contagious viral and vector-borne infections through the non-selective import of sick dogs and dogs with incomplete vaccination from Eastern Europe. CDV shedding was detected for several months after the cessation of clinical signs, which emphasised the roles of asymptomatic carriers in CDV epidemiology. A long-term follow-up using sensitive PCR and strict quarantine measures is of upmost importance in preventing the spread of infection. Dog owners and animal welfare organisations should be educated regarding the importance of complete vaccinations and the impact of dog imports on the spread of viral and vector-borne pathogens.

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  • The presence of D. immitis is expanding throughout Spanish national territory, with infected cats reported in Ceuta and Melilla and in the north of the country, similar to canine heartworm.

    “Moreover, it is shown that the presence of this parasite is expanding throughout the national territory, also reporting infected cats in Ceuta and Melilla (Spanish autonomous cities on the north coast of Africa) and in the north of the country, similar to what has been reported for canine heartworm [117].”
  • In Spain, a recent nationwide study reported overall feline seroprevalence of 9.4% (anti-D. immitis antibodies) and prevalence of 0.5% (antigens), with highest seroprevalences in the Canary Islands (19.2%), Balearic Islands (16%), and Mediterranean coast communities (9.2-11.2%).

    “In Spain, a recent nationwide study reported an overall seroprevalence of 9.4% (anti-D. immitis antibodies) and a prevalence of 0.5% (antigens) [117]. This study showed the highest seroprevalences in the Canary Islands (19.2%) and the Balearic Islands (16%), as well as the autonomous communities located on the Mediterranean coast (9.2–11.2%).”
  • Some studies have reported D. immitis in cats in traditionally endemic countries such as Spain, Portugal, Italy, and Greece, while first reports of feline heartworm have been published in some new endemic countries (Germany and Austria).

    “Some studies have reported D. immitis in cats in traditionally endemic countries, such as Spain, Portugal, Italy, and Greece, while the first reports of feline heartworm have been published in some new endemic countries as well (Germany and Austria).”

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Authors
Willi, B., Spiri, A. M., Meli, M. L., Grimm, F., Beatrice, L., Riond, B., Bley, T., Jordi, R., Dennler, M., & Hofmann-Lehmann, R.
Affiliations
University of Zurich (CH)
Corresponding author
Willi, Barbara
Venue
BMC Veterinary Research
Published
2015-07-16
Volume
11
Issue
1
Pages
154-154
ISSN
1746-6148 (ISSN-L)
OpenAlex
W1846284978
Cited by
41
References
47
Citations by year
2026: 4 · 2025: 6 · 2024: 1 · 2023: 8 · 2022: 7 · 2021: 3 · 2020: 6 · 2019: 3 · 2017: 2 · 2016: 1
FWCI
0.78
Type
journal article
Language
en
Open access
Locations
  • BMC Veterinary Research (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
Universität Zürich (FK-53210-01-01)
Topics
  • Health Sciences › Medicine › Epidemiology › Virology and Viral Diseases
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Virus Infections Studies
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Animal Disease Management and Epidemiology
Keywords
canine distemper virus, rescue dogs, imported dogs, vector-borne diseases, Babesia, Leishmania infantum, Dirofilaria immitis, canine parvovirus, asymptomatic carriers, quarantine, vaccination, hemagglutinin gene, Switzerland
MeSH terms
Animals, Babesia, Babesiosis, Dirofilaria immitis, Dirofilariasis, Disease Outbreaks, Distemper, Distemper Virus, Canine, Dogs, Female, Hungary, Insect Vectors, Leishmaniasis, Visceral, Male, Molecular Sequence Data, Switzerland, Virus Shedding, Leishmania infantum

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