期刊
JOURNAL OF INVERTEBRATE PATHOLOGY
卷 78, 期 4, 页码 215-219出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/jipa.2001.5073
关键词
Vibrio alginolyticus; V. harveyi; V. parahaemolyticus; V. penaeicida; Litopenaeus vannamei; larvae; postlarvae; survival; pathogenicity
类别
The rapid expansion of commercial culture of penaeid shrimp is threatened by Vibrio diseases affecting survival and growth. These opportunistic microorganisms are considered part of the normal ecosystem of penaeid shrimp and cause diseases only under conditions that favor them over the host. Shrimp larvae show different susceptibility to these pathogenic agents. In the present work, we report on a comparative study of the susceptibility of all American white shrimp (Litopenaeus vannamei) larval substages to four potentially pathogenic Vibrio species (V. harveyi, V. parahaemolyticus, V. alginolyticus, and V. penaeicida). Strains of these bacterial species were used to infect nauplii, protozoea I-III, mysis I-III, and postlarvae 1 by immersion challenge at 10(3), 10(5), or 10(7) cfu mL(-1) for 30 min. V. alginolyticus infection had no significant effect on survival rate, compared to control, in all shrimp larvae and at all doses tested. Shrimp larvae infected with V. alginolyticus showed a high survival rate compared to other Vibrio species at the three dose levels. V. penaeicida produced a significant mortality effect (P < 0.01) in all shrimp substages and only in postlarvae 1 at low infection dose (10(3) cfu mL(-1)). V. harveyi and V. parahaemolyticus induced significant mortality rates (P < 0.01) only at high doses in shrimp larvae. In summary, shrimp larvae demonstrated an age susceptibility that depends on the Vibrio species and dose level. (C) 2001 Elsevier Science (USA).
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