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    Hepatitis and splenitis due to systemic tetratrichomoniasis in an American white pelican (Pelecanus erythrorhynchos)

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    Date Issued
    2013
    Author
    Burns, Rachel E.
    Braun, Josephine
    Armién, Aníbal G.
    Rideout, Bruce
    Subject Terms
    SAFARI PARK
    ZOOS
    CALIFORNIA
    PATHOLOGY
    DIAGNOSIS
    PELICANS
    HEALTH
    Journal
    Journal of Veterinary Diagnostic Investigation
    Volume
    25
    Issue
    4
    Start page
    511
    End page
    514
    
    Metadata
    Show full item record
    DOI
    10.1177/1040638713488368
    Alternative link
    http://journals.sagepub.com/doi/10.1177/1040638713488368
    Abstract
    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. Polymerase chain reaction and sequencing of the small subunit ribosomal RNA gene identified nucleotide sequences with 99% identity to Tetratrichomonas gallinarum, which is a common inhabitant of the intestinal tract of galliform and anseriform birds that has occasionally been associated with disease, including typhlitis and hepatitis. Damage to the cecal mucosa in the pelican from trematodes and secondary bacterial infection could have allowed invasion and systemic dissemination of the organism. Exposure of the pelican to a variety of native and exotic anseriform and galliform birds at the zoological institution could have led to cross-species infection and severe manifestation of disease in a novel host.
    URI
    http://hdl.handle.net/20.500.12634/653
    Type
    Article
    Rights
    © 2013 The Author(s)
    ae974a485f413a2113503eed53cd6c53
    10.1177/1040638713488368
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    Conservation Science Publications

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