Red mark syndrome in rainbow trout farmed in the Republic of Macedonia: First observation - Cvetkovikj, Aleksandar; Angjelovski Branko; Dijana Blazhekovikj - Dimovska; Vasil Kostov; Rodne Nastova; Natasha Gjorgovska; Stefanovska, Jovana; Cvetkovikj, Iskra (Faculty of Veterinary medicine in Skopje, 2016)