Protection against atypical Aeromonas salmonicida infection in carp (Cyprinus carpio L.) by oral administration of humus extract
Protection against atypical Aeromonas salmonicida infection in carp (Cyprinus carpio L.) by oral administration of humus extract
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DOI：
10.1292/jvms.69.405
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发表时间：
2007-04-01
影响因子：
1.2
通讯作者：
Nakagawa, Tsuyoshi
中科院分区：
文献类型：
--
作者：
Kodama, Hiroshi;Denso;Nakagawa, Tsuyoshi
腐殖物质是在腐殖土中的有机物质分解过程中形成的，并且在许多存在有机物质和微生物的自然环境中发现。本研究以鲤鱼（Cyprinus carpio L.）诱导对实验性非典型杀鲑气单胞菌感染的有效保护。用10%、5%和1%的腐殖酸浸提液吸附在干饲料颗粒上，可显著抑制鲤鱼的死亡率和皮肤病如溃疡和溃烂的发生。中位存活天数也大于在未经处理的鱼与10%或5%的腐殖质提取物处理的鱼。非典型A.从部分死鱼的溃疡性病变中分离出杀鲑菌，但也从这些鱼中分离出嗜水气单胞菌和黄杆菌属，证实了皮肤病变进展过程中细菌种群的变化。这些结果清楚地表明，用腐殖酸提取物处理鱼对预防A。杀鲑病
Humic substances are formed during the decomposition of organic matter in humus, and are found in many natural environments in which organic materials and microorganisms have been present. In the present study, oral administration of humus extract to common carp (Cyprinus carpio L.) induced effective protection against experimental atypical Aeromonas salmonicida infection. Mortality of fish and development of skin lesions such as hemorrhages and ulcers were significantly suppressed in carp treated with 10%, 5% or 1% humus extract adsorbed on dry feeding pellets. The median surviving days was also greater in fish treated with 10% or 5% humus extract than in untreated fish. Atypical A. salmonicida was isolated from ulcerative lesions of part of dead fish, but Aeromonas hydrophila and Flavobacterium sp. were also isolated from these fish, verifying bacterial population changes during the progression of skin lesions. These results clearly show that treatment of fish with humus extract is effective in preventing A. salmonicida disease.