Over a ten-month period, the gills of one-hundred imported pearlscale goldfish (Carassius auratus)
were examined for ectoparasites, before released from quarantine in Iran. Of the nine species of
ectoparasites isolated in this study, six were monogeneans (Dactylogyrus vastator, D. baueri, D.
formosus, Dactylogyrus sp., Gyrodactylus chinensis and Gyrodactylus. sp.) and three were protistans
(Ichthyophthirius multifiliis, Trichodina sp. and Cryptobia sp.).The isolated parasites were fixed and
stained by appropriate methods. The fish were imported from south-Asia. The highest and the
lowest levels of parasitism were from D. baueri and I. multifiliis respectively. Though shipments
came from up to three exporting regions, all shipments were found to have high prevalence and
intensity of parasites. It is suggested that exact quarantine is not performed before retail selling for
imported fish. We recommend that before transporting internationally, fish should be examined
for high risk parasites and other pathogens to prevent the spread of disease and parasites.
Over a ten-month period, the gills of one-hundred imported pearlscale goldfish (Carassius auratus)were examined for ectoparasites, before released from quarantine in Iran. Of the nine species ofectoparasites isolated in this study, six were monogeneans (Dactylogyrus vastator, D. baueri, D.formosus, Dactylogyrus sp., Gyrodactylus chinensis and Gyrodactylus. sp.) and three were protistans(Ichthyophthirius multifiliis, Trichodina sp. and Cryptobia sp.).The isolated parasites were fixed andstained by appropriate methods. The fish were imported from south-Asia. The highest and thelowest levels of parasitism were from D. baueri and I. multifiliis respectively. Though shipmentscame from up to three exporting regions, all shipments were found to have high prevalence andintensity of parasites. It is suggested that exact quarantine is not performed before retail selling forimported fish. We recommend that before transporting internationally, fish should be examinedfor high risk parasites and other pathogens to prevent the spread of disease and parasites.
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