a survey on the helminth parasites of wild ducks in northern parts of iran

a total of 8 species of wild ducks were collected from mazandaran and guilan provinces in the north part of iran. after autopsy, a total of 30 species of different helminths, 11 sp. from anas platyrhynchos, 6 sp. from anas crecca, 3 aythya fuligula, 3 sp . from aythya ferina, 4 sp. from aythya fuligula, 3 sp. from anas strepera, 2 sp. from anser anser and 7 sp. form cygnus cygnus, were recovered. cotylurus cornutus was the most common helminth with respect to the number of infected ducks. the major important species which are reported for the first time in iran are as follows: from anas platyrhynchos: echinostoma grandis, psilochasmus oxyurus, psilostomum sp., hymenolepis collaris, anomotaenia citita, aploparaksis endacantha. from anas crecca: apatemon gracilis, hymenolepis collaris. from aythya ferina: leucochlodium macrostoma, echnioparyphium nordiana, typhlocoelum cucumerinum, notocotylus babai, diplopos the iaevis, psilotrema sp. from aythya fuligula : diorchis (d) inflate, aploparaksis endacantha. from anas strepera: notocotylus magniovatus, contracaecum spiculigerum, echinuria uncinata. from anser anser: opisthorchis germinus, paryphostomum novum from cygnus cygnus: echniostoma mendax, notocotylus aegyptiacus, leucochlordium macrostoma, denderobilharzia anatinarum, hymenolepis collaris, contracaecum spiculigerum.