The life cycle and pathogenicity of Eimeria fulva Farr, 1953 in domestic goslings

文献类型： 外文期刊

第一作者： Dai, YB

作者： Dai, YB;Liu, M;He, NY;Tao, JP;Liu, XY

作者机构：

关键词： coccidium;Eimeria fidva;gosling;life cycle;pathogenicity;INTRANUCLEAR DEVELOPMENT;COCCIDIUM;GEESE

期刊名称：ACTA PROTOZOOLOGICA （ 影响因子：0.892； 五年影响因子：0.932 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The life cycle and pathogenicity of Eimeria fulva were studied. Eighteen, 10-day-old, artificially-reared coccidia-free goslings (Anser cygnoides var. domestica) were inoculated orally with 7.0x10(5) - 1.5x10(6) sporulated oocysts of Eimeria fulva and killed at intervals from 24 to 288 h post-inoculation (PI). Parts of the visceral organs including intestines, kidney, liver, gallbladder, and spleen front inoculated goslings were fixed, sectioned. and observed microscopically. The results revealed that at least 2 generations of meronts Occurred in the life cycle of E. fulva. The first generation completed maturation at about 72 h PI, and the second at about 144 h PI. Each meront contained about 15 merozoites. Development of gamonts began at about 144 h PI. The prepatent period was 7.5 days and patency Continued for 2.5 days. Sporulation of oocysts occurred in 60-84 h at 25 degrees C. Developmental stages were present in the epithelia] cells of the villi and crypts, and in the lamina propria of the whole intestine and cloaca, resulting ill local desquamation and necrosis of the epithelium (including crypt epithelium), edema, hemorrhages, and infiltration of inflammatory cells. Histological lesions were pronounced in the jejunum and the ileum. The infected goslings mainly showed diarrhoea, slight bloody feces, but no death. The results suggest that E.fulva may be mildly pathogenic for goslings.

分类号： Q915.81

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