Rogers Holly A, Taylor Sabrina S, Hawke John P, Schott Eric J, Anderson Lively Julie A
School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, USA.
Dis Aquat Organ. 2015 Jan 15;112(3):207-17. doi: 10.3354/dao02803.
Blue crab diseases, parasites, and commensals are not well studied in the Gulf of Mexico, and their prevalence rates have only been sporadically determined. Commercial soft shell shedding facilities in Louisiana experience high mortality rates of pre-molt crabs, and some of these deaths may be attributable to diseases or parasites. During the active shedding season in 2013, we determined the prevalence of shell disease, Vibrio spp., Lagenophrys callinectes, and Hematodinium perezi at 4 commercial shedding facilities along the Louisiana coast. We also detected Ameson michaelis and reo-like virus infections. Shell disease was moderately prevalent at rates above 50% and varied by shedding facility, collection month, and crab size. Vibrio spp. bacteria were prevalent in the hemolymph of 37% of the pre-molt crabs. Lagenophrys callinectes was highly prevalent in the pre-molt crabs, but because it is a commensal species, it may not cause high mortality rates. Hematodinium perezi was absent in all pre-molt crabs.
在墨西哥湾，蓝蟹疾病、寄生虫和共生生物尚未得到充分研究，其流行率也只是偶尔被测定。路易斯安那州的商业软壳蜕壳设施中，蜕壳前的螃蟹死亡率很高，其中一些死亡可能归因于疾病或寄生虫。在2013年的活跃蜕壳季节，我们测定了路易斯安那州海岸4个商业蜕壳设施中壳病、弧菌属、秀丽隐藻和派琴虫的流行率。我们还检测到了米氏艾美虫和类呼肠孤病毒感染。壳病的流行程度中等，发病率超过50%，并因蜕壳设施、采集月份和螃蟹大小而异。37%的蜕壳前螃蟹的血淋巴中存在弧菌属细菌。秀丽隐藻在蜕壳前的螃蟹中高度流行，但由于它是一种共生物种，可能不会导致高死亡率。所有蜕壳前的螃蟹中均未发现派琴虫。
