Ultrastructural studies of Sarcocystis cruzi (Hasselmann, 1926) Wenyon, 1926 infection in cattle (Bos taurus): Philippine cases

College

College of Science

Department/Unit

Biology

Document Type

Article

Source Title

Parasite

Volume

8

Issue

3

First Page

251

Last Page

254

Publication Date

1-1-2001

Abstract

This paper documents the first report of Sarcocysti s cruzi infection domesticated cattle (Bos taurus] in the Philippines. Fusiform-shaped microscopic sarcocysts (183-578 μm long and 20-98 μm wide) with distinct septae were found in the skeletal, striated and heart muscle. The sarcocyst wall or parasitophorous vacuolar membrane, 1.37-2.75 μm thick consisted of closely-packed villar protrusions 80-400 nm in dm. Middle and distal segments of VP were bent approximately 90 degrees parallel to the cyst wall surface. The villar core lacked microtubules, and at some points, the distal ends of the VP collectively formed conical tufts. Primary cyst wall had numerous 70-100 nm bubble-like undulations, and the ground substance was 0.25-0.5 μm in thickness. The ultrastructure of S. cruzi cyst wall typifies the Type 7 sarcocyst wall, and bears close similarities with the Philippine and the Vietnam strain of bubaline Sarcocystis levinei.

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Digitial Object Identifier (DOI)

10.1051/parasite/2001083251

Disciplines

Biology

Keywords

Sarcocystosis in animals--Philippines; Cattle—Diseases--Philippines

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