期刊
JOURNAL OF INVERTEBRATE PATHOLOGY
卷 112, 期 3, 页码 281-293出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jip.2012.12.014
关键词
Microsporidia; Caridina formosae; Triwangia caridinae; Sporophorous vesicles; Ultrastructure; SSU rDNA
类别
资金
- Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture, Executive Yuan, Republic of China [102AS-10.2.1-BQ-B1]
A new microsporidium was isolated from the endemic, Taiwanese shrimp, Caridina formosae (Decapoda, Atyidae) from northern Taiwan. A conspicuous symptom of infection was presence of opaque white xenomas located in the proximity of the alimentary tract, the surface of the hepatopancreas, and the gills. A fully developed xenoma consisted of a hard, thick capsule filled with sporophorous vesicles containing multiple spores. Microsporidia developed synchronously within the same sporophorous vesicle, although the stage of parasite development differed among the vesicles. Fresh spores were pyriform, mononucleated and measured 6.53 x 4.38 mu m. The polar filament was anisofilar with 9-11 coils. Phylogenetic analysis based on the small subunit ribosomal DNA sequence showed that the isolate is most similar to the fish microsporidian clade containing the genera Kabatana, Microgemma, Potaspora, Spraguea, and Teramicra. The highest sequence identity, 80%, was with Spraguea spp. Based on pathogenesis, life cycle and phylogenetic analysis, we erect a new genus and species, Triwangia caridinae for the novel microsporidium. (C) 2013 Elsevier Inc. All rights reserved.
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