Hoberg E P, Cawthorn R J, Hedstrom O R
U.S. Department of Agriculture, Beltsville Agricultural Research Center, Maryland 20705.
J Wildl Dis. 1993 Jul;29(3):495-7. doi: 10.7589/0090-3558-29.3.495.
Sporulated oocysts (mean dimensions = 13.0 x 10.8 microns) and sporocysts (11.3 x 5.5 microns) 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 oocytes 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 microns) 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.
在美国俄勒冈州梅德福附近捕获的一只自然感染的北方斑点鸮（Strix occidentalis caurina）的小肠固有层中，存在类似于弗伦克球虫属（Frenkelia sp.）或肉孢子虫属（Sarcocystis sp.）的球虫的孢子化卵囊（平均尺寸 = 13.0×10.8微米）和孢子囊（11.3×5.5微米）。这些卵囊和孢子囊的尺寸似乎比其他以鸟类为终末宿主的肉孢子虫科物种的要小得多。此外，在肠上皮中还观察到了许多发育阶段以及一种可能为等孢球虫属（Isospora）物种的未孢子化卵囊（平均尺寸22.8×17.8微米）。这是关于斑点鸮肠道球虫的首次报道。两种寄生虫似乎均未导致该鸟类死亡。
