Blastocystis isolates from a dog and their owners presenting with chronic diarrhoea. Dogs as reservoirs of Blastocystis: research in Poland and worldwide.

Blastocystis cf. hominis is an unicellular protozoan parasite commonly found in the gastrointestinal tract of humans and animals. Blastocystis is characterized by high morphological and genetic diversity.

Cestodes of the genus Tetrabothrius (Tetrabothridea: Tetrabothriidae) from Antarctic flying seabirds.

Four species of the genus Tetrabothrius were reported from three species of Antarctic flying seabirds. There were: Tetrabothrius (Culmenamniculus) gracilis Nybelin, 1916 and Tetrabothrius (Oriana) minutus Szpotańska, 1917 from Macronectes giganteus (Gmelin, 1789); Tetrabothrius (Oriana) filiformis Nybelin, 1916 from Larus dominicanus Lichtenstein, 1823 and Tetrabothrius (Culmenamniculus) cylindraceus Rudolphi, 1849 from Stercorarius antarcticus lonnbergi (Mathews, 1912). M.

Molecular identification larvae of Onchobothrium antarcticum (Cestoda: Tetraphyllidea) from marbled rockcod, Notothenia rossii, in Admiralty Bay (King George Island, Antarctica).

Antarctic bony fishes are infected with cestode larvae belonging to the order Tetraphyllidea (parasites as adults in chondrichthyans). Larvae of the Tetraphyllidea differ from each other in the morphology of their scoleces and represent five forms. There are larvae with bothridia subdivided into one, two and three loculi, bothridia sac-like in shape and bothridia undivided with hook-like projections.

[Helminths of Antarctic fishes].

Antarctic fishes are represented by sharks, skates (Chondrichthyes) and bony fishes (Teleostei). Teleosts play an important role in the completion of life cycles of many helminth species. They serve as either definitive or intermediate and paratenic hosts.