Response of American lobsters Homarus americanus to infection with a field isolate of Aerococcus viridans var. homari (gaffkemia): survival and haematology

Diseases of Aquatic Organisms

R. J. Cawthorn¹  A. L. Battison¹  B. Horney¹ 

关键词: Lobster;    Homarus americanus;    Gaffkemia;    Aerococcus viridans var. homari;   

DOI  :  10.3354/dao061263

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: American lobsters Homarus americanus were inoculated with a field isolate of the Gram-positive bacterium Aerococcus viridans var. homari, causative agent of gaffkemia, at 1 × 10⁶, 1 × 10⁴ or1 × 10² colony forming units (CFU) kg^–1 or with sterile 3% NaCl and maintained at 10 or 15°C until they died or were euthanised. Progression of disease in individual animals was monitored daily by total haemocyte count(THC) and haemolymph culture. Post-mortem examinations were performed on all lobsters. Effects of both ambient temperature and infective dose on survival time were observed. Marked bacteraemia occurred in all mortalities. Haemocytopenia (THC < 10× 10⁹ cells l^–1) preceded death in most, but not all, mortalities.

【 授权许可】

Unknown