scholarly journals Ultrastructure of the Cysts of Sarcocystis Tarandivulpes from Skeletal Muscle of Reindeer (Rangifer Tarandus Tarandus)

1985 ◽  
Vol 26 (1) ◽  
pp. 91-104
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Rangifer Tarandus ◽  
Rangifer Tarandus Tarandus

Ultrastructure of the cysts of Sarcocystis hardangeri from skeletal muscle of reindeer (Rangifer tarandus tarandus)

1985 ◽  
Vol 63 (11) ◽  
pp. 2676-2683 ◽  
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Rangifer Tarandus ◽  
Thick Layer ◽  
Ground Substance ◽  
Unit Membrane ◽  
Rangifer Tarandus Tarandus ◽  
Transmission Electron ◽  
Central Bundle ◽  
Cyst Membrane ◽  
Honeycomb Pattern

Cysts of Sarcocystis hardangeri from reindeer (Rangifer tarandus tarandus) were examined by transmission electron microscopy. The large ovoid cysts were located within distended skeletal muscle cells, which were encapsulated by the thickened external lamina of the muscle cell and an exterior thick layer of collagen-rich connective tissue. The cysts were limited by a unit membrane (the cyst membrane) that was raised into closely spaced anastomosing microplicae, forming a honeycomb pattern. Between the microplicae the cyst membrane formed vesiclelike invaginations. The cyst surface was provided with numerous slanting linguiform processes, measuring 25–35 μm in length. The entire cyst surface, including the surface of the projections, had a highly irregular, folded outline. The projections contained a central bundle of longitudinally orientated microtubules. The interior of the cyst was rich in cyst ground substance that formed conspicuous septa. The metrocytes showed an extensive vacuolation of their cytoplasm, eventually leading to a disintegration of the cell. The cysts of S. hardangeri were structurally very similar to one type of sarcocysts previously reported from moose (Alces alces).

Ultrastructure of the cysts of Sarcocystis tarandi from skeletal muscle of reindeer (Rangifer tarandus tarandus)

1985 ◽  
Vol 63 (12) ◽  
pp. 2913-2918 ◽  
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Rangifer Tarandus ◽  
Thick Layer ◽  
Ground Substance ◽  
Electron Dense Material ◽  
The Core ◽  
Dense Bodies ◽  
Rangifer Tarandus Tarandus ◽  
Transmission Electron ◽  
Cyst Membrane

Cysts of Sarcocystis tarandi from Rangifer tarandus tarandus were examined by transmission electron microscopy. The cysts were located within skeletal muscle cells and were limited by a unit membrane (the cyst membrane). The surface of the cyst was covered with densely packed, erect, villiform processes measuring 10.4 μm in length and 2.5 μm in diameter. The processes contained numerous longitudinally oriented microtubules. The cyst membrane was reinforced by an underlying 20–65 nm thick layer of electron-dense material, except at numerous points between the bases of the protrusions where it formed vesiclelike invaginations. Cyst ground substance formed a layer at the periphery of the cyst, filled the core of the projections, and formed septa that divided the cyst into many compartments. The compartments contained either cystozoites or metrocytes. The metrocytes possessed one or a few large dense bodies containing crystalline inclusions. The cystozoites multiplied by endodyogeny.

Ultrastructure of the cysts of Sarcocystis rangiferi from skeletal muscle of reindeer (Rangifer tarandus tarandus)

1985 ◽  
Vol 63 (11) ◽  
pp. 2669-2675 ◽  
Author(s):  
Bjørn Gjerde
Keyword(s):  
Skeletal Muscle ◽  
Connective Tissue ◽  
Rangifer Tarandus ◽  
Thick Layer ◽  
Ground Substance ◽  
Connective Tissue Capsule ◽  
Rangifer Tarandus Tarandus ◽  
Transmission Electron ◽  
Cyst Membrane ◽  
Tissue Capsule

Cysts of Sarcocystis rangiferi from reindeer (Rangifer tarandus tarandus) were examined by transmission electron microscopy. The cysts were located within skeletal muscle cells which were encapsulated by a thick layer of connective tissue. The connective tissue capsule consisted of numerous fibroblasts and a matrix with a moderate number of collagen fibrils, and represents an analogue of the so-called secondary cyst wall of Sarcocystis gigantea and various Besnoitia species. The cysts were limited by a unit membrane, the cyst membrane, which in part was reinforced by a thin subjacent layer of electron-dense material. The cyst surface was covered by closely packed, villiform protrusions, measuring 12–14 μm in length and 8 μm in diameter. The cyst membrane formed vesiclelike invaginations at and between the bases of the protrusions. Cyst ground substance divided the interior of the cyst into numerous compartments containing metrocytes or cystozoites. The cystozoites multiplied by endodyogeny.

scholarly journals Clinical outbreak of babesiosis caused by Babesia capreoli in captive reindeer ( Rangifer tarandus tarandus ) in the Netherlands

2017 ◽  
Vol 8 (5) ◽  
pp. 799-801 ◽  
Author(s):  
Jan H. Bos ◽  
Fokko C. Klip ◽  
Hein Sprong ◽  
Els M. Broens ◽  
Marja J.L. Kik
Keyword(s):  
The Netherlands ◽  
Rangifer Tarandus ◽  
Rangifer Tarandus Tarandus
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