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Sarcocystis infection of the African buffalo [Syncerus caffer] in the Kruger National Park, South Africa

100%

Quandt S., Bengis R. G., Stolte M., Odening K., Bockhardt I.

Acta Parasitologica

1997

tom 42

nr 2

Muscle (tongue and oesophagus) from African buffaloe, Syncerus caffer was examined for the presence of sarcocysts. Twenty-two tongue samples (66.7%) from 33 adult buffaloes (older than one year) were infected with numerous macrocysts and a few microcysts of a Sarcocystis sp. In two of these animals sarcocysts were also found in the oesophagi. Furthermore, an oesophagus from an additional older buffalo was positive. Sarcocysts were not seen in 7 buffaloes younger than one year. Light and electron microscopic investigations revealed sarcocysts with a cyst wall ultrastructure belonging to the type 21 of the classification by Dubey et al. (1989a). For the first time this type of sarcocyst is described in African buffaloes. Encapsulation of the host cell (“secondary cyst wall”), often present in other Sarcocystis species with macrocysts, was lacking. The cyst wall was morphologically similar to S. fusiformis isolated from the water buffalo (Bubalus bubalis). However, dimorphism of cystozoites, not known in S. fusiformis, was noted. Some sarcocysts had short plump, and others long bananashaped cystozoites. This phenomenon is discussed, considering also the possibility of sexual dimorphism.

Sarcocystis hippopotami sp.n. and S.africana sp.n. [Protozoa, Sarcocystidae] from the hippopotamus [Artiodactyla, Hippopotamidae] in South Africa

75%

Odening K., Quandt S., Bengis R. G., Stolte M., Backhardt I.

Acta Parasitologica

1997

tom 42

nr 4

Two new Sarcocystis species found in muscle fibres of the diaphragm of a hippopotamus in South Africa are described by light and electron microscopy. Sarcocystis hippopotami sp. n. forms macrocysts (4-10 x 0.66-1.10 mm) with a parasite-induced encapsulation of the host muscle fibre in which the plasma membrane of the latter remains unaltered. The sarcocyst wall represents a new ultrastructural type, characterized by thumb-like villar protrusions with a compact central bundle of microtubules in the core. The bradyzoites (15.6 x 2.2 µm) are straight and slender. Sarcocystis africana sp. n. forms round microcysts (diameter 0.5-0.7 mm) representing a new type of the cyst wall ultrastructure which is characterized by irregularly semicircular or rectangular villar protrusions with granular and fibrillar content. The bradyzoites (9.5 x 3.1 µm) are straight and plump.

Ograniczanie wyników

2 Acta Parasitologica

2 Bengis R. G.

2 Odening K.

2 Quandt S.

2 Stolte M.

1 Backhardt I.

1 Bockhardt I.

2 1997

Wyniki wyszukiwania

Sarcocystis infection of the African buffalo [Syncerus caffer] in the Kruger National Park, South Africa

Sarcocystis hippopotami sp.n. and S.africana sp.n. [Protozoa, Sarcocystidae] from the hippopotamus [Artiodactyla, Hippopotamidae] in South Africa