Diseases of Aquatic Organisms | |
Prokaryote infections in the New Zealand scallops Pecten novaezelandiae and Chlamys delicatula | |
B. K. Diggles1  P. M. Hine1  | |
关键词: Scallops; Pecten; Chlamys; Digestive epithelium; Branchial epithelium; Haemocytes; Rickettsias; Mollicutes; Mycoplasmas; Tip structure; Ultrastructure; | |
DOI : 10.3354/dao050137 | |
学科分类:生物科学(综合) | |
来源: Inter-Research | |
【 摘 要 】
ABSTRACT: Four intracellular prokaryotes are reported from the scallops Pecten novaezelandiae Reeve, 1853 and Chlamys delicatula Hutton, 1873. Elongated (1025 x 110 nm), irregular (390× 200 nm), or toroidal (410 x 200 nm) mollicute-like organisms (M-LOs) occurred free in the cytoplasm in the digestive diverticular epithelial cells of both scallop species. Those in P. novaezelandiaebore osmiophilic blebs that sometimes connected the organisms together, and some had a rod-like protrusion, both of which resemble the blebs and tip structures of pathogenic mycoplasmas. The M-LOs in C. delicatula had a slightly densercore than periphery. Round M-LOs, 335 x 170 nm, occurred free in the cytoplasm of agranular haemocytes in P. novaezelandiae, without apparent harm to the host cell. In P. novaezelandiae, 2 types of highly prevalent(95 to 100%) basophilic inclusions in the branchial epithelium contained Rickettsia-like organisms (R-LOs). Type 1 inclusions occurred in moderately hypertrophied, intensely basophilic cells, 8 to 10 µm in diameter, containing elongate intracellular RLOs, 2000 x 500 nm. Type 2 inclusions were elongated and moderately basophilic in markedly hypertrophic branchial epithelial cells, 50 x 20 µm in diameter, containing intracellular organisms 500× 200 nm in diameter. The possible roles of these organisms in pathogenesis is discussed.
【 授权许可】
Unknown
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RO201911300140341ZK.pdf | 627KB | download |