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Hepatitis associated with a Sarcocystis canis-like protozoan in a Hawaiian monk seal (Monachus schauinslandi).

Authors
  • Yantis, D
  • Moeller, R
  • Braun, R
  • Gardiner, C H
  • Aguirre, A
  • Dubey, J P
Type
Published Article
Journal
The Journal of parasitology
Publication Date
Dec 01, 2003
Volume
89
Issue
6
Pages
1258–1260
Identifiers
PMID: 14740925
Source
Medline
License
Unknown

Abstract

A Hawaiian monk seal (Monachus schauinslandi) died in captivity at the National Marine Fisheries Service, Kewalo Basin Facility in Honolulu, Hawaii. The animal was icteric, and the liver was friable. Microscopic lesions were detected in the colon and liver. Colonic lesions included multifocal, necrohemorrhagic colitis associated with gram-negative bacilli. The liver lesions included random hepatic necrosis and cholestasis. Asexual stages of a Sarcocystis canis-like apicomplexan were detected in hepatocytes. The parasite divided by endopolygeny. Merozoites occasionally formed rosettes around a central residual body. Ultrastructurally, merozoites lacked rhoptries. This is the first report of S. canis infection in M. schauinslandi, which is an endangered pinniped in U.S. waters.

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