两种羊泰勒虫的形态学观察和比较

Morphological Comparison of Two Species of Theileria in Sheep

经PCR鉴定的吕氏泰勒虫和尤氏泰勒虫各感染1只除脾绵羊,取羊耳尖血涂片,光学显微镜观察其形态。两种泰勒虫的细胞浆呈浅蓝色,细胞核为紫色,主要形态包括梨籽形、圆形(或卵圆形)、针形、杆状、三叶草形、十字架形、逗点形和不规则形等。在整个病程中,梨籽形、圆形(或卵圆形)和针形3类虫体数量居多。两种羊泰勒虫在形态学上无明显差异。

Two splenectomized sheep were infected respectively with Theileria luwenshuni and T. uilenbergi, 2 species identified by PCR. When piroplasms were found in blood smears from ears of the sheep, morphological observation on the Theileria spp. was carried out by optical microscopy. By Giemsa staining, the cytoplasm exhibited in slight blue and nucleus in purple. The two Theileria species displayed various shapes, but pyriform-shaped, round-shaped and needle-shaped parasites appeared in every stage of the infection. In fact, there is no significant morphological difference between the two species.