Cercetările ihtiohelmintofaunei diverselor specii de pești din varii biotopuri acvatice naturale şi artificiale din Re-publica Moldova au pus în evidență prezența speciei Diplostomum spathaceum Rudolphi, 1819 Olsson, 1876 la speciile de peşti: boarță-europeană ndash; Rhodeus amarus Bloch, 1782 EIndash;35,0%, IIndash;1-13 ex.; sânger ndash; Hypophthalmichthys molitrix Valencienne, 1884 EIndash;60,0%, IIndash;1-13 ex.; caras ndash; Carassius auratus sensu lato EIndash;27,0%, IIndash;1-7 ex.; batcă-comună ndash; Blicca bjoerkna Linnaeus, 1758 EIndash;86,6%, IIndash;10-50 ex.; sorete ndash; Lepomis gibbosus Linnaeus, 1758 EIndash;80,0%, IIndash;1-7 ex.; stronghil ndash; Neogobius melanostomus Pallas, 1814 EIndash;67,0%, IIndash;3-8 ex.; moacă-de-brădiș-vestic ndash; Proterorhinus semilunaris Heckel, 1837 EIndash;35,0%, IIndash;3-160 ex.. Speciile de pești ghiborț-comun Gymnocephalus cernua Linnaeus, 1758 și obleț-comun Alburnus alburnus Linnaeus, 1758 erau infestate nesemnificativ. În dependenţă de nivelul de infestare cu D. spathaceum, s-au remarcat leziuni specifice formei cronice de diplostomoză. De asemenea, datorită par-ticularităților structurale ale cristalinului globului ocular, specia de peşti Perccottus glenii Dybowski, 1877, manifestă o rezistență înaltă faţă de agresiunea parazitară a cercarilor speciei D. spathaceum.

The research of helminth fauna of different fishes from different natural and artificial aquatic biotopes from the Republic of Moldova has revealed the presence of the species Diplostomum spathaceum Rudolphi, 1819 Olsson, 1876 in the fishes: european bitterling ndash; Rhodeus amarus Bloch, 1782 EIndash;35%, IIndash;1-13 ex.; silver carp ndash; Hypophthalmichthys molitrix Valencienne, 1884 EIndash;60%, IIndash;1-13 ex., Carassius auratus sensu lato EIndash;27%, IIndash;1-7 ex.; white bream ndash; Blicca bjoerkna Linnaeus, 1758 EIndash;86,6%, IIndash;10-50 ex.; pumpkinseed ndash; Lepomis gibbosus Linnaeus, 1758 EIndash;80%, IIndash;1-7ex.; round goby ndash; Neogobius melanostomus Pallas, 1814 EIndash;67%, IIndash;3-8 ex.; western tubenose goby ndash; Proterorhinus semilunaris Heckel, 1837 EIndash;35%, IIndash;3-160 ex.. The fish species ruffe ndash; Gymnocephalus cernua Linnaeus, 1758 and bleak ndash; Alburnus alburnus Linnaeus, 1758 were insignificantly infested. Depending on the level of infestation with D. spathaceum, lesions specific to the chronic form of diplostomiasis were noted. Also, due to the structural features of the eyeball crystalline, the chinese sleeper Perccottus glenii Dybowski, 1877 exhibits a high resistance to parasitic aggression of the cercariae of D. spathaceum.