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Second Fatal Borna Virus Infection Recorded in Pfaffenhofen

Authorities have launched a multi-week probe into how the field shrew-borne virus crossed into humans following two fatal infections.

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So sieht die Feldspitzmaus aus. Sie gilt als Überträger der Krankheit.
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Overview

  • The second patient, a 51-year-old triathlete, died in early July after weeks in intensive care, following the first BoDV-1 fatality in early June.
  • Experts say two fatalities in quick succession are unusual for this rare virus but may reflect coincidence given no shared exposure.
  • Field shrews are identified as the primary reservoir for BoDV-1, though exact human transmission routes—such as contact with excretions or inhalation of contaminated dust—remain unclear.
  • The Bavarian State Office for Health and Food Safety and the Pfaffenhofen district office are conducting investigations expected to last several weeks to trace possible infection pathways.
  • Since its discovery as a human pathogen in 2018, BoDV-1 has caused severe encephalitis with a near-100% fatality rate and about five to ten annual cases in Germany without available vaccine.