TY - JOUR

T1 - Absence of zoonotic parasites in salmonid aquaculture in Denmark

T2 - Causes and consequences

AU - Karami, Asma M.

AU - Marnis, Huria

AU - Korbut, Rozalia

AU - Zuo, Shaozhi

AU - Jaafar, Rzgar

AU - Duan, Yajiao

AU - Mathiessen, Heidi

AU - Al-Jubury, Azmi

AU - Kania, Per W.

AU - Buchmann, Kurt

N1 - Publisher Copyright: © 2021 The Authors

PY - 2022

Y1 - 2022

N2 - A parasitological investigation of Danish farmed freshwater (180 fish) and marine rainbow trout (170 fish), Oncorhynchus mykiss, was performed with an emphasis on the occurrence of zoonotic parasites. Reliability of the parasitological methods applied was assessed by examining fish from a stock of wild Atlantic cod Gadus morhua caught in the Sound (Øresund). While wild fish carried a number of zoonotic parasites, we found that farmed fish, both in the fresh and marine environment, were free of these parasites. Non-zoonotic trout parasites found were eye-flukes Diplostomum paracaudum, D. pseudospathaceum and Eubothrium crassum in maricultured rainbow trout. The acanthocephalan Echinorhynchus truttae and Diplostomum sp. were found in freshwater trout. In contrast, wild cod were infected with five different nematode species (Anisakis simplex, Contracaecum osculatum, Pseudoterranova decipiens, Hysterothylacium aduncum, Cucullanus cirratus), three trematode species (Lepidapedon elongatum, Cryptocotyle lingua, Hemiurus communis), one copepod species (Lernaeocera branchialis) and one myxozoan (Myxobolus aeglefini). The risk factors associated with aquaculture production in an infectious aquatic environment are analyzed and reasons for absence of zoonotic parasites in aquacultured trout are pinpointed. Based on the analysis recommendations for management practices securing parasite freedom in aquacultured fish are given.

AB - A parasitological investigation of Danish farmed freshwater (180 fish) and marine rainbow trout (170 fish), Oncorhynchus mykiss, was performed with an emphasis on the occurrence of zoonotic parasites. Reliability of the parasitological methods applied was assessed by examining fish from a stock of wild Atlantic cod Gadus morhua caught in the Sound (Øresund). While wild fish carried a number of zoonotic parasites, we found that farmed fish, both in the fresh and marine environment, were free of these parasites. Non-zoonotic trout parasites found were eye-flukes Diplostomum paracaudum, D. pseudospathaceum and Eubothrium crassum in maricultured rainbow trout. The acanthocephalan Echinorhynchus truttae and Diplostomum sp. were found in freshwater trout. In contrast, wild cod were infected with five different nematode species (Anisakis simplex, Contracaecum osculatum, Pseudoterranova decipiens, Hysterothylacium aduncum, Cucullanus cirratus), three trematode species (Lepidapedon elongatum, Cryptocotyle lingua, Hemiurus communis), one copepod species (Lernaeocera branchialis) and one myxozoan (Myxobolus aeglefini). The risk factors associated with aquaculture production in an infectious aquatic environment are analyzed and reasons for absence of zoonotic parasites in aquacultured trout are pinpointed. Based on the analysis recommendations for management practices securing parasite freedom in aquacultured fish are given.

KW - Aquaculture

KW - Fish

KW - Prophylaxis

KW - Zoonosis

U2 - 10.1016/j.aquaculture.2021.737793

DO - 10.1016/j.aquaculture.2021.737793

M3 - Journal article

AN - SCOPUS:85120583612

VL - 549

JO - Aquaculture

JF - Aquaculture

SN - 0044-8486

M1 - 737793

ER -