期刊
PARASITOLOGY
卷 135, 期 9, 页码 1075-1092出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0031182008004605
关键词
Tetracapsuloides; PKX; PKD; Malacosporea; Myxosporea; Buddenbrockia; Sphaerospora; Kudoa; Myxozoa; ultrastructure
类别
资金
- Biotechnology and Biological Sciences Research Council (BCC) [5050421]
Tetracapsuloides bryosalmonae is the myxozoan that causes the commercially, and ecologically important proliferative kidney disease of salmonid fish species. Immunohistochemistry and electron microscopy Were used to examine the development of this parasite within the kidney of the brown trout Salmo trutta. The main replicative phase of T. bryosalmonae is a cell doublet composed of a primary cell and a single secondary cell. Engulfment of one secondary cell by another to form a secondary-tertiary doublet (S-T doublet) heralded the onset of sporogony whereupon the parasite migrated to the kidney tubule lumen. Within the tubule, the parasite transformed into a pseudoplasmodium and anchored to the tubule epithelial cells Via pseudopodial extensions. Within each pseudoplasmodium developed a single spore, composed of 4 valve cells, 2 polar capsules and I sporoplasm. The pseudoplasmodia formed Clusters suggesting that large numbers of spores develop Within the fish. This examination of T. bryosalmonae suggests that the main replicative phase of fresh water myxozoans Within vertebrates is via direct replication of cell doublets rather than through the rupturing of extrasporogonic stages, while tertiary cell formation relates only to sporogony. Taken in conjunction with existing phylogenetic data, 5 distinct sporogonial sequences are identified for the Myxozoa.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据