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Infections with zoonotic pathogens have received increasing attention in recent years, as reflected in the literature of both veterinary and human medicine. and are recognised as the principal causes of waterborne outbreaks worldwide, but there is still limited data on the role of wild carnivores, such as red foxes and wolves, as reservoir hosts and in disseminating these pathogens in the environment. The aim of the current project was to analyse the prevalence and abundance of and infections in foxes from seven voivodeships and in wolves from the Warmia-Masuria Voivodeship in Poland and to conduct a phylogenetic analysis of the detected parasites. For the detection of both parasites, we used the commercial immunofluorescent assay MeriFluor /. For detection we also applied modified Ziehl-Neelsen (ZN) staining of faecal smears and, following PCR amplification, sequenced the rDNA locus. For detection, we sequenced the glutamate dehydrogenase () gene. In total, 117 and 69 faecal samples obtained from red foxes and wolves, respectively, were screened for the presence of /. In red foxes, prevalence was 38.5% and 15.4% for spp. and , respectively. In wolves, the prevalence of spp. was 14.5%, and only one sample was -positive. , sp. vole genotype, and sp. were identified in red foxes, while and sp. were detected in wolves. Our results indicate that red foxes and grey wolves act as reservoir hosts of spp. and in natural areas in Poland.
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http://dx.doi.org/10.3390/pathogens14050500 | DOI Listing |
J Wildl Dis
September 2025
Division of Wildlife Conservation, Alaska Dept of Fish and Game, 1300 College Road, Fairbanks, Alaska 99701, USA.
This report describes highly pathogenic avian influenza virus (HPAI) H5N1 infections in carnivores in Alaska, US between 2022 and 2024, including a black bear (Ursus americanus), a brown bear (Ursus arctos), and the first known report of HPAI in an ermine (Mustela ermina). The two bears were cubs, and the ermine was a young adult. The black bear and ermine were euthanized after demonstrating neurologic signs, including circling, blindness, ataxia, or seizures.
View Article and Find Full Text PDFJ Anim Ecol
September 2025
Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
Birds generally rely on proactive anti-predator strategies when selecting nest sites, as they have limited options to adapt to changing levels of risk once incubation begins. Arctic waterfowl often nest colonially as an anti-predator strategy, but dispersed-breeding species may use other proactive strategies, such as nesting in areas perceived to be safer. However, empirical links between spatial patterns of predation risk and nest habitat selection or success are needed to better understand how predator activity shapes Arctic waterfowl reproduction.
View Article and Find Full Text PDFCarrion is a nutrient-rich but spatiotemporally unpredictable resource that supports diverse trophic interactions, and its consumption plays a key role in energy recycling within ecosystems. Although previous research has almost exclusively examined scavenger activity at carcasses, the broader impacts of fluctuating carrion availability on landscape-scale activity patterns and scavenger competitive interactions remain largely unexplored. Here, we investigate whether carrion provisioning influences broader road use activity in two competing facultative scavenger species: dingoes (), an apex scavenger, and red foxes (), a mesoscavenger.
View Article and Find Full Text PDFGenome Biol Evol
July 2025
Graduate School of Science and Engineering, University of Toyama, Toyama, Toyama 930-8555, Japan.
Continental islands provide a system for understanding the mechanisms behind allopatric evolution. The red fox (Vulpes vulpes) is characterized by its remarkable dispersibility and adaptability, covering the widest distributional range among the Carnivora. The Hondo red fox (V.
View Article and Find Full Text PDFPeatland ecosystems and the unique biodiversity they support are under risk from multiple stressors, including changes in species interactions. Land use changes that lead to increases in the density and activity of mammalian mesopredators such as red fox () and pine marten () could be particularly detrimental to vulnerable peatland species such as wading birds (). However, our understanding of predator-prey interactions in the context of land use change remains limited, because most published evidence is correlative.
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