55987 is a postal code in Winona, Minnesota, USA.
- part of Winona County
55987 a.k.a. Infectious salmon anemia virus: Infectious salmon anemia or anaemia is a viral disease of Atlantic Salmon that affects fish farms in Canada, Norway, Scotland and Chile, causing severe losses to infected farms. The disease is listed as a non-exotic disease of the EU and is therefore watched closely by the European Community Reference Laboratory for Fish Diseases.
- also known as Isavirus