[1] Univ Thessaly, Sch Hlth Sci, Fac Med Vet, Lab Ichthyol Fish Dis & Aquaculture, Kardhitsa 43100, Greece
[2] Univ Thessaly, Sch Hlth Sci, Fac Med Vet, Lab Microbiol & Parasitol, Kardhitsa, Greece
[3] Aristotle Univ Thessaloniki, Fac Vet Med, Pathol Lab, GR-54006 Thessaloniki, Greece
[4] Technol Inst Epirus, Dept Freshwater Fisheries, Igoumenitsa, Greece