Peer-reviewed veterinary case report
Babesia infection in dogs in Germany 2007-2020 and risk factors
By Schäfer, Ingo et al.·Published in Parasites & vectors·2023·LABOKLIN GmbH & Co. KG, Germany·View original on PubMed →
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Original publication title: Molecular detection of Babesia spp. in dogs in Germany (2007-2020) and identification of potential risk factors for infection.
- Species:
- dog
Plain-English summary
A study found that 3.2% of dogs tested in Germany were positive for Babesia, a parasite that can cause serious illness. The highest rates of infection were seen in spring and autumn, particularly in April and October, when ticks are most active. Male dogs and those under 7 years old were more likely to test positive, especially if they had ticks or weren't on preventive treatments. While travel abroad was considered a risk factor, many cases occurred in dogs that had never left Germany. It's important for dog owners in Germany to be aware of the risks and consider tick prevention, especially during peak seasons.
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Abstract
BACKGROUND: In Europe, canine babesiosis is most frequently caused by Babesia canis and Babesia vogeli, and occasionally by Babesia gibsoni.. In Germany, B. canis is recognized as endemic. The aims of this study were to assess how often Babesia spp. infections were diagnosed in a commercial laboratory in samples from dogs from Germany, and to evaluate potential risk factors for infection. METHODS: The database of the LABOKLIN laboratory was screened for Babesia spp.-positive polymerase chain reaction (PCR) tests for dogs for the period January 2007-December 2020. Sequencing was performed for positive tests from 2018 and 2019. Binary logistic regression analysis was performed to determine the effects of sex, season, and year of testing. Questionnaires were sent to the submitting veterinarians to obtain information on travel abroad, tick infestation, and ectoparasite prophylaxis of the respective dogs. Fisher's exact test was used to calculate statistical significance and P < 0.05 was considered statistically significant. RESULTS: In total, 659 out of 20,914 dogs (3.2%) tested positive for Babesia spp. by PCR. Of 172 sequenced samples, B. canis was identified in 156, B. vogeli in nine, B. gibsoni in five, and B. vulpes in two. Season had a statistically significant impact on test results when summer/winter (1.6% tested positive) was compared to spring/autumn (4.7%), with peaks in April (5.2%) and October (7.4%) [P < 0.001, odds ratio (OR) = 3.16]. Sex (male 3.5%, female 2.8%; P = 0.012, OR = 1.49) and age (< 7 years old 4.0%, ≥ 7 years old 2.3%; P < 0.001, OR = 1.76) of the tested dogs also had a statistically significant effect. A statistically significant impact was demonstrated for observed tick attachment (P < 0.001, OR = 7.62) and lack of ectoparasite prophylaxis (P = 0.001, OR = 3.03). The frequency of positive Babesia spp. tests did not significantly differ between the 659 dogs that had never left Germany and the 1506 dogs with known stays abroad (P = 0.088). CONCLUSIONS: The possibility of canine infection with B. canis needs to be especially taken into consideration in spring and autumn in Germany as the activity of the tick Dermacentor reticulatus, a potential vector for canine babesiosis, is highest in these seasons. Travel and importation of dogs are considered major factors associated with canine babesiosis in Germany. However, autochthonous Babesia spp. infections also occur in a considerable number of dogs in Germany.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/37919757/