Volume 49/Number 2/Abstract 01
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Acta Parasitologica, Vol.49, No. 2, 2004, 93-101
J.P. Dubey(1)*, Emily Lane(2) and Erna van Wilpe(3) - Sarcocystis ramphastosi sp. nov. and Sarcocystis sulfuratusi sp. nov. (Apicomplexa, Sarcocystidae) from the keel-billed toucan (Ramphastos sulfuratus)
(1)Animal Parasitic Diseases Laboratory, United States Department of Agriculture, Agricultural Research Service, Animal and Natural Resources Institute, BARC-East, Building 1001, 10300 Baltimore Avenue, Beltsville, MD 20705-2350, USA; (2)P.O. Box 556, Derdepark, South Africa; (3)Electron Microscope Unit, Faculty of Veterinary Science, University of Pretoria, South Africa
*Corresponding author: jdubey@anri.barc.usda.gov
ABSTRACT

Two new species of Sarcocystis, Sarcocystis ramphastosi sp. nov. and Sarcocystis sulfuratusi sp. nov. are described from a naturally infected keel-billed toucan (Ramphastos sulfuratus). Only sarcocysts were found and they were mature. Sarcocysts of S. ramphastosi were up to 3 mm long and up to 1 mm wide. The sarcocyst wall was smooth. The villar protrusions on the sarcocyst wall of S. ramphastosi were up to 6.5 m long and up to 3 m wide; they were folded over the sarcocyst wall giving a thin-walled appearance. The microtubules in villar protrusions were smooth and confined to villar protrusions. Bradyzoites in sections were 4-4.5 1.3-1.6 m in size. Sarcocysts of S. sulfuratusi were up to 900 m long and up to 200 m wide. The sarcocyst wall was smooth and thin-walled. The villar protrusions were up to 4.3 m long and 1.4 m wide. The microtubules in villar protrusions extended deeper into the granular layer of the sarcocyst wall and those in the granular layer were more electron-dense than in the villar protrusions. Bradyzoites were 5.0-7.0 1.5-2.2 m in size.


KEY WORDS: Sarcocystis ramphastosi, Sarcocystis sulfuratusi, Protozoa, toucan, Ramphastos sulfuratus

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