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Rickettsia-like organism infection in a freshwater cultured fish Ophiocephalus argus C. in China
Guo, QL; Jia, WZ; Han, XP; Cai, TZ; Gong, XN; Sun, XF; Guo, QL, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2004-05-01
Source PublicationPROGRESS IN NATURAL SCIENCE
ISSN1002-0071
Volume14Issue:5Pages:417-+
AbstractFrom 2001 to 2002, a new and emergent infectious disease of Ophiocephalus argus occurred in a fishery in Hubei Province, China, with an incidence of 60% similar to 70% and a mortality as high as 100 %. The diseased fish showed an enlarged abdomen, the millet-like nodules in internal organs, and the swollen kidney which was composed of 5 similar to 10 sarcoma-like bodies in cream or gray-white colour or ulcerated into beandregs-like substance. Light microscopic observation revealed the basophilic or acidphilic inclusions in cytoplasm of the cells and the granulomas, a diffusive chronic inflammation in internal organs. Further analysis under an electron microscope indicated that the intracytoplasmic inclusions were rickettsia-like organisms (RLOs) that are either spherical or coccoid, with variable size, ranging from 0.5 similar to 1.5 mum in diameter, and enclosed within membrane-bound cytoplasmic vacuoles. RLO had a central nucleoid region with some fine filamentous structures and an electron-dense granule. Its cytoplasm contained abundant ribosomal bodies. Occasionally, RLO appeared to be divided by binary fission. RLOs were also observed in the homogenized tissue of infected fish. The results suggested that the death of cultured O. argus was caused by RLO infection.; From 2001 to 2002, a new and emergent infectious disease of Ophiocephalus argus occurred in a fishery in Hubei Province, China, with an incidence of 60% similar to 70% and a mortality as high as 100 %. The diseased fish showed an enlarged abdomen, the millet-like nodules in internal organs, and the swollen kidney which was composed of 5 similar to 10 sarcoma-like bodies in cream or gray-white colour or ulcerated into beandregs-like substance. Light microscopic observation revealed the basophilic or acidphilic inclusions in cytoplasm of the cells and the granulomas, a diffusive chronic inflammation in internal organs. Further analysis under an electron microscope indicated that the intracytoplasmic inclusions were rickettsia-like organisms (RLOs) that are either spherical or coccoid, with variable size, ranging from 0.5 similar to 1.5 mum in diameter, and enclosed within membrane-bound cytoplasmic vacuoles. RLO had a central nucleoid region with some fine filamentous structures and an electron-dense granule. Its cytoplasm contained abundant ribosomal bodies. Occasionally, RLO appeared to be divided by binary fission. RLOs were also observed in the homogenized tissue of infected fish. The results suggested that the death of cultured O. argus was caused by RLO infection.
SubtypeArticle
KeywordSnakeheaded Fish ( Ophiocephalus Argus) Rickettsia-like Organism (Rlo) Infection Pathology Fish Disease
DepartmentChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Subject AreaMultidisciplinary Sciences
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Science & Technology - Other Topics
WOS SubjectMaterials Science, Multidisciplinary ; Multidisciplinary Sciences
WOS IDWOS:000221600300006
WOS KeywordSALMON SALMO-SALAR ; PISCIRICKETTSIA-SALMONIS ; ATLANTIC SALMON ; FARMED ATLANTIC ; TRANSMISSION ; TAIWAN
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9476
Collection期刊论文
Corresponding AuthorGuo, QL, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
AffiliationChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Guo, QL,Jia, WZ,Han, XP,et al. Rickettsia-like organism infection in a freshwater cultured fish Ophiocephalus argus C. in China[J]. PROGRESS IN NATURAL SCIENCE,2004,14(5):417-+.
APA Guo, QL.,Jia, WZ.,Han, XP.,Cai, TZ.,Gong, XN.,...&Guo, QL, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2004).Rickettsia-like organism infection in a freshwater cultured fish Ophiocephalus argus C. in China.PROGRESS IN NATURAL SCIENCE,14(5),417-+.
MLA Guo, QL,et al."Rickettsia-like organism infection in a freshwater cultured fish Ophiocephalus argus C. in China".PROGRESS IN NATURAL SCIENCE 14.5(2004):417-+.
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