DAO 88:65-68 (2009)  -  DOI: https://doi.org/10.3354/dao02152

ABSTRACT: Red mark syndrome (RMS) or cold water strawberry disease (CWSD) is a non-lethal skin disease of rainbow trout Oncorhynchus mykiss that is of high economic importance in the UK. The disease is temperature-dependent, with up to 60% morbidity at water temperatures below 15°C. Although CWSD is horizontally transmissible, the aetiology is still unknown. Here we describe the first cases of RMS on the European mainland in the alpine regions of Switzerland and Austria. In Switzerland, morbidity remained around 1% after the first outbreak, whereas in Austria no further cases were diagnosed.

KEY WORDS: Red mark syndrome · Coldwater strawberry disease · Oncorhynchus mykiss ·Austria · Switzerland · Water temperature