Roundworm eggs, SEM

Roundworm eggs, SEM

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Credit: JANNICKE WIIK-NIELSEN/VETINST/SCIENCE PHOTO LIBRARY

Caption: Coloured scanning electron micrograph (SEM) of roundworm (Contracaecum rudolphii) eggs. The adult worms occur in the digestive tract of fish-eating birds, and the eggs are shed in the faeces. C. rudolphii is the most important parasite of cormorants. The genus Contracaecum are parasitic nematodes belonging to the family Anisakidae. Fish are by far the main source of infection as they serve as intermediate host of the nematodes. The final hosts are marine mammals (e.g. seals) or piscivorous birds (e.g. cormorants and pelicans). Identification of these nematodes is important in terms of seafood safety and public health, as humans may be infected following consumption of infected seafood. Magnification: x60 when printed at 10cm wide.

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Keywords: animal, anisakidae, biological, biology, birds, black background, close-up, colored, colour manipulated, coloured, contracaecum, cormorant, detail, egg, endoparasite, false-colored, false-coloured, fauna, fish-eating, intestinal, invertebrate, invertebrates, marine, micrograph, nature, nematoda, nematode, oocytes, parasite, parasitic, parasitology, pelicane, piscivorous, roundworms, rudolphii, scanning electron micrograph, scanning electron microscope, seafood, seal, sem, wildlife, worm, zoological, zoology

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