Alicja Bernad, Elżbieta Terech-Majewska, Joanna Pajdak, Patrycja Schulz, Andrzej K. Siwicki
ABSTRACT. Infectious and parasitic diseases of fish cultured under controlled conditions is a significant factor limiting the development of aquaculture. In 2016, the Laboratory of Fish and Crayfish Diseases, Department of Veterinary Hygiene, Voivodeship Veterinary Inspectorate in Olsztyn examined 360 lots of fish from 51 fisheries facilities comprising 4,407 fish in total. During the period analyzed, 181 cases of disease of bacterial etiology were diagnosed. Most frequently these were infections caused by Pseudomonas fluorescens and Aeromonas hydrophila complex. Parasites were identified as the cause of disease in 48 cases and included mainly Ichthyophthirius multifillis, Ichtyobodo necator and Trichodina spp. One case of an asymptomatic carrier of the IPN virus was confirmed. The number of cases of disease increased during the analyzed period by 59 in comparison with 2015, when 122 cases of disease of bacterial etiology were diagnosed, while in 2016 this number was 181. The number of cases of diseases with a parasitic etiology were similar with 39 infections in 2015 and 48 in 2016. A new trend was noted in the increased diagnosis of diseases caused by new pathogens and parasites in the culture of fish species that are new to aquaculture This confirms the necessity for systematic diagnostics and targeted prophylactics.
Key words: fish disease, laboratory diagnostics, bacterial pathogens, fish parasites
Przyjęto po recenzji 08.02.2017 r.