Biomaterial Database

[Light and electron microscope studies on cysts of Sarcocystis fusiformis in the muscles of calves infected experimentally with oocysts and sporocysts of Isospora hominis Railliet et Lucet, 1891. 2. Fine structure of metrocytes and merozoites (author's transl)]. 1975

A O Heydorn, and H Mehlhorn, and R Gestrich

In several experiments calves were infected with sporocysts of Isospora hominis thus producing "thick-walled" cysts of Sarcocystis fusiformis in muscles. Following the growth of the cyst the development of the cyst stages (metrocytes, merozoites) was studied by electron microscopy. Cyst formation began about 40 days p.i. from a parasitophorous vacuole containing exclusively ovoid metrocytes. On the 62nd day p.i. mainly metrocytes and a few banana-shaped merozoites were present within the cysts, whereas on the 98th day p.i. only merozoites, i.e. infectious stages, were observed. The metrocytes were surrounded directly by the amorphous ground substance of the cyst's interior, but the merozoites were arranged relatively loose within chamber-like hollows of the ground substance. The metrocytes are globular cells, about 6-7 mum by 4. 5 mum. The typical three-layered pellicle had a few invaginations and several micropores, which seem to ingest numerous small vesicles from the interior of the cyst. These cells posses a conoid, polar ring with 22 anchored supellicular microtubules, several rhoptries and micronemes, a glogi complex anterior to the large nucleus. The nucleus has a spherical nucleolus consisting of granular and fibrillar zones. Chromosomal structres were seen in two different stages: large dense plaques (condensed stage), and as small dense granules of 300-400 a diameter, arranged sperically within the karyoplasm ( extended stage). The nuclear pores show the typical eight-fold symmetry known from other protozoa and numerous metazoa. The rought endoplasmic reticulum is very prominent within these cells as well as the tubular mitochondria...

UI	MeSH Term	Description	Entries
D007549	Isospora	A genus of protozoan parasites found in the intestines of birds, amphibians, reptiles, and mammals, including man. The oocysts produce two sporocysts, each with four sporozoites. Many species are parasitic in wild and domestic animals.	Isosporas
D008953	Models, Anatomic	Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.	Anatomic Models,Models, Surgical,Moulages,Models, Anatomical,Anatomic Model,Anatomical Model,Anatomical Models,Model, Anatomic,Model, Anatomical,Model, Surgical,Moulage,Surgical Model,Surgical Models
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D002417	Cattle	Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.	Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D003048	Coccidiosis	Protozoan infection found in animals and man. It is caused by several different genera of COCCIDIA.	Besnoitiasis,Besnoitiosis,Besnoitiases,Besnoitioses,Coccidioses
D004195	Disease Models, Animal	Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases.	Animal Disease Model,Animal Disease Models,Disease Model, Animal
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012522	Sarcocystis	A genus of protozoa found in reptiles, birds, and mammals, including humans. This heteroxenous parasite produces muscle cysts in intermediate hosts such as domestic herbivores (cattle, sheep, pigs) and rodents. Final hosts are predators such as dogs, cats, and man.	Sarcosporidia,Sarcocysti,Sarcosporidias
D012523	Sarcocystosis	Infection of the striated muscle of mammals by parasites of the genus SARCOCYSTIS. Disease symptoms such as vomiting, diarrhea, muscle weakness, and paralysis are produced by sarcocystin, a toxin produced by the organism.	Sarcosporidiosis,Sarcocystoses,Sarcosporidioses

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Isospora hominis (Railliet and Lucet 1891) in the Netherlands.

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[Occurrence and epidemiology of Isospora hominis (Railliet and Lucet, 1891) invasion].

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Hematologic and serologic changes in calves experimentally infected with Sarcocystis fusiformis.

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[Isospora hominis (Sarcocystis porcihominis?)--the first nonimported case in Czechoslovakia (author's transl)].

March 1978, Bratislavske lekarske listy,

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January 1972, Berliner und Munchener tierarztliche Wochenschrift,

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