期刊
JOURNAL OF FISH DISEASES
卷 43, 期 3, 页码 -出版社
WILEY
DOI: 10.1111/jfd.13135
关键词
bacillary necrosis of Pangasianodon; cohabitation challenge; Edwardsiella ictaluri; immersion challenge; Pangasianodon hypophthalmus
A bacterial infectivity challenge model of Edwardsiella ictaluri in striped catfish was developed. All experiments were conducted using a bacterial isolate of E. ictaluri that had been recovered during a natural outbreak of bacillary necrosis of Pangasianodon (BNP) in farmed striped catfish Pangasianodon hypophthalmus in Vietnam. Time of immersion in 10(7) CFU.ml(-1) had a significant effect on mortality. The immersion bacterial dose of 10(7) CFU/ml for 30 s resulted in a cumulative percentage mortality of 63%. Three to four days post-bacterial challenge, fish showed gross clinical signs of natural BNP and E. ictaluri was recovered and identified from these fish. Moreover, a cohabitation challenge was evaluated as an alternative challenge method, although the mortalities among the infected fish were lower at around 15%-40%. This study confirmed the horizontal transmission of E. ictaluri in striped catfish and elucidated that cohabitation challenge could be used in reproducing the disease under controlled conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据