Oct 13 – 15, 2025
Hotel Berlin, Berlin
Europe/Berlin timezone
All review results have been sent out on August 20th + September 2nd.

Screening of shrews for Borna disease virus 1 (BoDV-1) and its implications for public health management

Oct 15, 2025, 10:30 AM
15m
Hall "Berlin"

Hall "Berlin"

Oral presentation One Health in Public Health Session 9: One Health in Public Health II

Speaker

Lea Lenhard (Institute of Diagnostic Virology, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany; Bavarian Health and Food Safety Authority, Munich, Germany; Zoonotic Bornavirus-Focal Point Bavaria (ZooBoFo) 2.0, Germany)

Description

Borna disease virus 1 (BoDV-1) causes mostly fatal encephalitis in humans and other mammals. Its distribution area is restricted to parts of Southern and Eastern Germany, Austria, Switzerland and Liechtenstein. Spillover to dead-end hosts results from direct and/or indirect contact to bicolored white-toothed shrews (Crocidura leucodon), the natural BoDV-1 reservoir, which shed the virus via urine, feces, saliva and skin, but remain unaffected by the disease.
As part of this project, 263 shrews, predominately from Bavaria, were tested for BoDV-1 and their species was determined by a newly established RT-qPCR assay targeting the cytochrome b gene. Twenty-four (26.4%) of 91 C. leucodon as well as one out of 11 (9.1%) Mediterranean water shrews (Neomys anomalus) tested positive for BoDV-1, all of which originated from Bavaria. Phylogenetic analyses demonstrated the BoDV-1 sequences to belong to the same local clusters as found in Borna disease cases in the respective regions.
Several BoDV-1-positive shrews were found in human dwellings. Environmental samples were collected in five instances two to four weeks later, revealing low levels of BoDV-1 RNA but no infectious virus. In two cases, submitters had experienced close contact to excretions of BoDV-1-positive shrews, initiating post-exposure prophylaxis and 12-months of monitoring.
This One Health approach refines BoDV-1 risk areas and provides valuable insights into the poorly defined human-animal interface of BoDV-1 infection.

Keywords

BoDV-1, public health management, screening,

Registration ID OHS25-141
Professional Status of the Speaker Postdoc
Junior Scientist Status Yes, I am a Junior Scientist.

Author

Lea Lenhard (Institute of Diagnostic Virology, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany; Bavarian Health and Food Safety Authority, Munich, Germany; Zoonotic Bornavirus-Focal Point Bavaria (ZooBoFo) 2.0, Germany)

Co-authors

Philipp Starcky (Institute of Diagnostic Virology, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany; Bavarian Health and Food Safety Authority, Munich, Germany; Zoonotic Bornavirus-Focal Point Bavaria (ZooBoFo) 2.0, Germany) Prof. Barbara Schmidt (Zoonotic Bornavirus-Focal Point Bavaria (ZooBoFo) 2.0, Germany, Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany; Institute of Medical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany) Kinga Szathmari (Bavarian Health and Food Safety Authority, Munich, Germany) Dr Markus Bauswein (Zoonotic Bornavirus-Focal Point Bavaria (ZooBoFo) 2.0, Germany; Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany) Dr Viola C. Haring (Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany) Prof. Rainer G. Ulrich (Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany) Prof. Martin Beer (Institute of Diagnostic Virology, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany) Dr Merle M. Böhmer (Bavarian Health and Food Safety Authority, Munich, Germany; Zoonotic Bornavirus-Focal Point Bavaria (ZooBoFo) 2.0, Germany; Institute of Social Medicine and Health Systems Research, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany) Dr Dennis Rubbenstroth (Institute of Diagnostic Virology, Friedrich-Loeffler-Institut (FLI), Federal Research Institute for Animal Health, Greifswald - Insel Riems, Germany; Zoonotic Bornavirus-Focal Point Bavaria (ZooBoFo) 2.0, Germany)

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