[Light and electron microscope studies on cysts of Sarcocystis ovicanis Heydorn et al. (1975) within muscle fibres of sheep (author's transl)].

Four conventionally reared lambs, isolated at the age of 5 and 8 weeks, were orally infected with oocysts and sporocysts from dogs, which had been fed raw muscles from sheep containing small cysts of S. tenella. Three lambs, each infected with 100,000 sporocysts, were killed at days 41, 63 and 81 p.

[Light and electron microscope studies on cysts of Sarcocystis fusiformis in the muscles of calves infected experimentally with oocysts and sporocysts of the large form of Isospora bigemina from cats (author's transl)].

In several experiments young calves were infected with oocyss and sporocysts of the large form of isospora bigemina from cats, which has been fed by raw beef containing Sarcocystis fusiformis cysts. On he 98th and 160th day p.i.

[Light and electron microscopic studies on cysts of Sarcocystis fusiformis in the muscles of calves infected experimentally with oocytes and sporocysts of the large form of Isospora bigemina from dogs. 2. The fine structure of cyst stages].

In several experiments calves were infected with sporocytes of the large form of Isospora bigemina from dogs thus producing "thin-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 34 days p.

[Light and electron microscope studies on cysts of Sarcocystis fusiformis in the muscles of calves infected experimentally with oocysts and sporocysts of the large form of Isospora bigemina from dogs. 1. The development of cysts and "cyst wall" (author's transl)].

In several experiments young calves were infected with Isospora bigemina (large form) sporocysts excreted by dogs which had been fed with raw beef containing Sarcocystis fusiformis cysts. On the 27th, 34th, 62nd, 76th and 150th day p.i.

[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)].

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.

[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. 1. The development of cyst and cyst wall (author's transl)].

In several experiments young calves were infected with isospora hominis sporocysts excreted by human males who had ingested raw beef containing Sarcocystis fusiformis cysts. On the 29th, 48th, 62nd and 98 day p.i.