Ultrastructural differentiation between sarcocysts of Sarcocystis hirsuta and Sarcocystis hominis

Veterinary Parasitology
J P DubeyW A Charleston

Abstract

The ultrastructure of macroscopic (2-7 mm) Sarcocystis hirsuta sarcocysts from naturally infected cattle from New Zealand was compared with the ultrastructure of 222-day-old S. hominis in experimentally infected cattle in the United States. The villar protrusions of S. hirsuta were approximately 8 microns long, constricted at the base, expanded laterally in the mid-region and tapered distally. Some of the villar tips were folded to form two to four conical projections. The distal portion of the villar protrusions was bent at an angle of 45-90 degrees to the sarcocyst surface. The villar core contained numerous microfilaments and rows of electron-dense granules. The villar protrusions of S. hominis were cylindrical, oriented nearly perpendicularly to the sarcocyst surface, not constricted at their base and contained relatively few electron-dense granules. Although the sarcocysts of S. hirsuta were indistinguishable from those of S. hominis by light microscopy, they were distinguishable ultrastructurally.

References

Dec 23, 1975·Zeitschrift Für Parasitenkunde·A O HeydornM Rommel
Apr 1, 1987·Veterinary Parasitology·A BöttnerD Hopcroft
May 1, 1987·Veterinary Parasitology·A BöttnerM Rommel

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Citations

Nov 10, 2010·Parasitology Research·Gholam Reza MotamediKhosro Aghaeipour
May 9, 2014·Journal of Parasitic Diseases : Official Organ of the Indian Society for Parasitology·Hossein HamidinejatAbbas Hatami
Oct 1, 1991·Veterinary Parasitology·F S KibengeR J Markham
Sep 9, 2016·Journal of Parasitic Diseases : Official Organ of the Indian Society for Parasitology·Mohammad Mirzaei, Hadi Rezaei
Oct 28, 2006·Journal of Comparative Pathology·W WoudaJ P Dubey
Jul 7, 2007·Journal of Food Protection·L VangeelR Ducatelle
Dec 12, 2012·Polish Journal of Veterinary Sciences·K StojeckiT Cencek
May 24, 2019·Animals : an Open Access Journal From MDPI·Dina M MetwallyManal F El-Khadragy
Feb 25, 2021·Research in Veterinary Science·Benjamin M Rosenthal

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