Enteric Coccidia (Apicomplexa) in the Small Intestine of the Northern Spotted Owl (Strix occidentalis caurina)

Authors

Eric P. Hoberg, Animal Parasitic Disease Laboratory, Agricultural Research Service, United States Department of AgricultureFollow
R. J. Cawthorn, University of Prince Edward Island
O. R. Hedstrom, Oregon State University

Date of this Version

1993

Citation

Journal of Wildlife Diseases (1993) 29(3): 495-497.

Comments

U.S. government work.

Abstract

Sporulated oocysts (mean dimensions = 13.0 x 10.8 μm) and sporocysts (11.3 x 5.5 μm) of a coccidian resembling Frenkelia sp. or Sarcocystis sp. were present in the lamina propria of the small intestine of a naturally-infected northern spotted owl (Strix occidentalis caurina) collected near Medford, Oregon, USA. Dimensions of these oocysts and sporocysts appear to be considerably smaller than those from other sarcocystid species with avian definitive hosts. Additionally, numerous developmental stages and unsporulated oocysts (mean dimensions 22.8 x 17.8 μm) of a possible species of Isospora also were observed in the intestinal epithelium. This constitutes the first report of enteric coccidia from spotted owls. Neither parasite appeared to cause the death of the bird.