Johns Hopkins ABX Guide
Powassan virus
MICROBIOLOGY
- Flavivirus, positive-strand RNA virus.
- Tick-borne encephalitis group
- Two lineages: can only be distinguished by molecular techniques capable of causing human infection.
- Powassan virus prototype (POWV lineage 1): enzootic cycle with tick Ixodes cookei and groundhogs or skunks.
- Deer tick virus (DTV, or POWV lineage 2): enzootic cycle between Ixodes scapularis and white-footed mice, same as Lyme disease.
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Last updated: March 5, 2023
Citation
Auwaerter, Paul G. "Powassan Virus." Johns Hopkins ABX Guide, The Johns Hopkins University, 2023. Pediatrics Central, peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540630/all/Powassan_virus.
Auwaerter PG. Powassan virus. Johns Hopkins ABX Guide. The Johns Hopkins University; 2023. https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540630/all/Powassan_virus. Accessed July 18, 2025.
Auwaerter, P. G. (2023). Powassan virus. In Johns Hopkins ABX Guide. The Johns Hopkins University. https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540630/all/Powassan_virus
Auwaerter PG. Powassan Virus [Internet]. In: Johns Hopkins ABX Guide. The Johns Hopkins University; 2023. [cited 2025 July 18]. Available from: https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540630/all/Powassan_virus.
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