| hepatitis and splenitis due to systemic tetratrichomoniasis in an american white pelican (pelecanus erythrorhynchos). | a free-ranging, young adult, female american white pelican (pelecanus erythrorhynchos), found dead on the grounds of the san diego zoo safari park in southern california, had severe multifocal to coalescing necrotizing hepatitis and splenitis on postmortem examination. histologically, within the large areas of necrosis were myriad pleomorphic, 5-20 µm in diameter, protozoal organisms with 1 to multiple nuclei. ultrastructurally, the organisms were consistent with a trichomonad flagellate. polyme ... | 2013 | 23674462 |