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

Kohara, Masakazu; Kasai, Hisae; Yoshimizu, Mamoru

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

Kohara, Masakazu; Kasai, Hisae; Yoshimizu, Mamoru

魚病研究, 2012, 47(2), 49-55

Permalink : https://hdl.handle.net/2115/53177

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アクセス権	open access
URI	https://hdl.handle.net/2115/53177
タイトル	Intra-ovum infection in salmonid eggs artificially contaminated with fish pathogenic bacteria : Flavobacterium psychrophilum, Renibacterium salmoninarum and Aeromonas salmonicida
タイトル	感染実験からみた魚病細菌のサケ科魚類卵内感染機序
著者	Kohara, Masakazu ; Kasai, Hisae ; Yoshimizu, Mamoru
著者名 Kohara, Masakazu 小原, 昌和
e-Rad_Researcher 50399995 著者名 Kasai, Hisae 笠井, 久会
e-Rad_Researcher 40122915 著者名 Yoshimizu, Mamoru 吉水, 守
言語	英語
キーワード	Intra-ovum infection
	Micropyle
	Perivitelline space
	Salmonid
	Flavobacterium psychrophilum
	Renibacterium salmoninarum
	Aeromona salmonicida
発行日	2012-06-15
出版者	日本魚病学会
収録物名	魚病研究
収録物名	Fish pathology
巻(号)	47(2)
ページ	49-55
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	0388-788X
EISSN	1881-7335
NCID	AN00063165
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3147/jsfp.47.49