The samples were two days old and there is contamination with free living nematodes, probably. Simple flotation (with sugar) was done. There are numerous thick shell eggs, possibly from ascaris parasite other than Ascaridia galli.
I attached two images (100x and 400x magnification) with micrometer bar inserted.
May I also ask for reference key for identification of eggs in waterfowl?
Harvie, thank you for your answer!
After the first results I have immediately asked for fresh samples. The owner collected them fresh from the ground and kept them in refrigerator for a few days until yesterday, when we examined them again. There are no free living nematodes, but the eggs, we previously have found, appear to be the same!
Additionally, he brought two ascarid like worms (see the image in attachment). Left one was 7.6 cm and right one 8.5 cm long. I haven't try to mount them in lactofenol yet, since I don't have the key for identification.
Any suggestions, and possible attachment, please?
It seems to be an ifection with Porrocaecum crassum (Deslongchamps, 1824), i nematode in stomach and intestine of domestic and wild ducks
For a reference I would try: Infectious and parasitic diseases of wild birds by John Davis or Infectious Diseases of Wild Birds by Nancy Thomas.
Porrocaecum is a genus belonging to the Family Ascarididae. According to the Fauna Europaea, the genus contains 13 valid species, which can be found in Europe. I think that as acceptable opinion, can be take, that the eggs are of one of them. Also I think that confirmation of similar point of view can be promising after obtaining of mature male and female parasites. This is only supposition.
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