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Intra-ovum infection in salmonid eggs artificially contaminated with fish pathogenic bacteria : Flavobacterium psychrophilum, Renibacterium salmoninarum and Aeromonas salmonicida

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Title: Intra-ovum infection in salmonid eggs artificially contaminated with fish pathogenic bacteria : Flavobacterium psychrophilum, Renibacterium salmoninarum and Aeromonas salmonicida
Other Titles: 感染実験からみた魚病細菌のサケ科魚類卵内感染機序
Authors: Kohara, Masakazu1 Browse this author
Kasai, Hisae2 Browse this author →KAKEN DB
Yoshimizu, Mamoru3 Browse this author →KAKEN DB
Authors(alt): 小原, 昌和1
笠井, 久会2
吉水, 守3
Keywords: Intra-ovum infection
Micropyle
Perivitelline space
Salmonid
Flavobacterium psychrophilum
Renibacterium salmoninarum
Aeromona salmonicida
Issue Date: 15-Jun-2012
Publisher: 日本魚病学会
Journal Title: 魚病研究
Journal Title(alt): Fish pathology
Volume: 47
Issue: 2
Start Page: 49
End Page: 55
Publisher DOI: 10.3147/jsfp.47.49
Abstract: Intra-ovum infection of artificially contaminated salmonid (rainbow trout or amago salmon) eggs was studied using three fish pathogens (Flavobacterium psychrophilum, Renibacterium salmoninarum and Aeromonas salmonicida). Artificial contamination was performed using egg-surface contamination or immersion-water contamination. For F. psychrophilum and R. salmoninarum, infection occurred by the entry of pathogens from the egg surface to the perivitelline space through the micropyle during water-hardening. The infection rate was higher for egg-surface contamination than for immersion-water contamination. The successful concentration of F. psychrophilum for the occurrence of intra-ovum infection was 10^7 CFU/mL or more for egg surface contamination, and was 10^9 CFU/mL or more for immersion-water contamination. After the entry into eggs, F. psychrophilum increased to 10^7 CFU/egg but A. salmonicida steadily decreased and became undetectable.   
Type: article
URI: http://hdl.handle.net/2115/53177
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 吉水 守

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