Loading
Vector Borne Infectious Diseases / Bartonella Species Infections Research / Parasitic Diseases Research and Treatment · Journal article
Frontiers in Cellular and Infection Microbiology · September 9, 2026
Early or partial results. Treat as a signal, not a conclusion.
This is a descriptive cross-sectional survey of Anaplasma phagocytophilum detection in 76 free-ranging brown bears in Slovakia using nested PCR and molecular genotyping. The study confirms exposure of Slovak brown bears to A. phagocytophilum and identifies genetic lineages of zoonotic relevance, but does not quantify epidemiologic role, transmission dynamics, or risk to human health.
Cross-sectional molecular survey. Free-ranging brown bears (Ursus arctos) in Slovakia. Specific eligibility criteria, capture method, age, sex, health status, and temporal sampling frame not stated.. n = 76. Slovakia.
Detection rate of Anaplasma spp. in brown bears was 8 out of 76 samples (10.53%; 95% CI: 4.7–19.7%) Sequence analysis confirmed all positive samples as A. phagocytophilum Phylogenetic analysis classified isolates into known European genetic lineages relevant to public and veterinary health
Safety was not reported in the material analysed. Check the source before drawing any conclusion about harm.
This finding is primarily relevant to wildlife epidemiology and veterinary surveillance. It suggests brown bears may maintain A. phagocytophilum in nature, but does not establish the magnitude of zoonotic risk to humans or whether bears amplify or attenuate transmission. Clinicians should note that wildlife exposure does not by itself indicate human disease risk.
A descriptive cross-sectional detection study in a wildlife reservoir with no comparator, control group, or intervention; establishes presence and molecular characterization but cannot quantify epidemiologic role or zoonotic risk.
As stated by the source record.
Quoted from the source exactly as published.
This finding is primarily relevant to wildlife epidemiology and veterinary surveillance. It suggests brown bears may maintain A. phagocytophilum in nature, but does not establish the magnitude of zoonotic risk to humans or whether bears amplify or attenuate transmission. Clinicians should note that wildlife exposure does not by itself indicate human disease risk.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
Wild animals play a crucial role in the maintenance of tick-borne pathogens, acting as reservoir and sentinel hosts within natural ecosystems. The ongoing expansion of tick populations across Europe has intensified the circulation of zoonotic tick-borne pathogens, including Anaplasma phagocytophilum. Although the epidemiology of this bacterium has been extensively investigated in domestic animals and small wild mammals, the contribution of large omnivores such as the brown bear ( Ursus arctos ) remains poorly understood, particularly with respect to their exposure to genetically distinct lineages with zoonotic potential, which requires further molecular characterization. This study aimed to determine the detection rate of Anaplasma spp. in free-ranging brown bears (n = 76) and to molecularly characterize detected A. phagocytophilum isolates regarding their potentially zoonotic lineages. Spleen and liver samples were screened for Anaplasma spp. by nested PCR targeting the 16S rRNA gene, with subsequent molecular characterization focused on groEL gene and ankA gene. In total, 8 out of 76 samples were positive for Anaplasma spp., corresponding to a PCR detection rate of 10.53% (95% CI: 4.7–19.7%), with subsequent sequence analysis confirming the presence of A. phagocytophilum. Phylogenetic reconstruction based on groEL and ankA gene fragments allowed classification of the isolates into known European genetic lineages. This research confirms A. phagocytophilum exposure within the Slovak brown bear populations, identifying genetic variants relevant to public and veterinary health. These results suggest that brown bears may be exposed to A. phagocytophilum and could potentially play a role in its enzootic cycle, though further studies are needed.
Taken from the source record, never inferred. Follow any of these and new work involving them reaches your briefing.