养殖红鳍东方鲀中华拟德氏吸虫病的危害与流行

Harm and Prevalence of the Disease of Paradeontacylix sinensis Liu Parasitized Cultured Fugu rubripes

福建闽东海水网箱养殖红鳍东方纯首次暴发流行中华拟德氏吸虫病，通过实地考察和解剖等研究中华拟德氏吸虫病的危害与流行．结果表明：其主要致病因子是成虫和虫卵，成虫寄生于肝门静脉，虫卵主要沉积于肝脏、胆囊、肠道等，引起组织病变如组织炎症、增生肥厚、形成纤维性结节等．虫卵比成虫的危害性更大．中华拟德氏吸虫病存在年循环流行，发生于每年5～9月中旬．6～8月期间感染率逐渐升高，最终达100％，并引起高死亡率，可达76％～83．1％．中华拟德氏吸虫是养殖河纯的重要病原体之一，严重危害河纯养殖。

This is the first report on the outbreak of Paradeontacylix sinensis Liu, 1997 infection on balloonfish Fugu rubripes cultured in cages in northeasten Fujian sea area. The harm and prevalence of this disease of P. sinensis was researched by means of observation and dissection. Results showed that the most important stages of P. sinensis parasitized Fugu spp. were adults and eggs. Adults parasitize hepatic portal vein, while eggs deposited in liver, gallbladder, intestine etc and leading to serious pathological changes in tissues such as inflammation, hyperplasia and fibrosis etc. The egg was more harmful than the adult. The prevalence of this disease was once a year, which was from May to middle September. The infection rate increased gradually and reached 100% finally, and caused the highest mortality （76%～83.1%） between June and August. P. sinensis was a main pathogen of cultured Fugu spp. , and can cause serious damages in marine Fugu spp. farming.