Transmission of the parasitic dinoflagellate Hematodinium sp. infection in blue crabs Callinectes sapidus by cannibalism.
Transmission of the parasitic dinoflagellate Hematodinium sp. infection in blue crabs Callinectes sapidus by cannibalism.
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寄生甲藻 Hematodinium sp 的传播。
DOI：
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发表时间：
2009
影响因子：
1.4
通讯作者：
M. Frischer
中科院分区：
文献类型：
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作者：
A. Walker;Richard F. Lee;M. Frischer
寄生甲藻 Hematodinium sp 感染。对蓝蟹 Callinectes sapidus 种群来说可能是毁灭性的。发病率和死亡率似乎取决于寄生生物的负担。受到严重感染的螃蟹会变得昏昏欲睡，如果不被捕食，就会死于压倒性的感染。我们报告了 Hematodinium sp 的传播情况。给蓝蟹喂食受感染的组织碎片，并在 1 至 48 小时内检查感染证据，并在 4 天后检查其总体健康状况。在喂食后的前 16 小时内，Hematodinium sp.在肠道中发现，随后血淋巴血细胞大量增加，并在组织中出现血细胞结节。 16 小时时，血细胞结节出现界限不清且杂乱无章。 24小时后，重度感染的螃蟹中没有看到结节。喂食后 48 小时结束时，73%（15 只中的 11 只）的螃蟹显示出感染 Hematodinium sp 的证据。感染强度（Hematodinium sp.占血淋巴中细胞的百分比）高于20％的螃蟹在4天内死亡。
Infection with the parasitic dinoflagellate Hematodinium sp. can be devastating to blue crab Callinectes sapidus populations. Morbidity and mortality appear to depend on the burden of parasitic organisms. Heavily infected crabs become lethargic and, if not preyed upon, succumb to overwhelming infection. We report on the transmission of Hematodinium sp. into blue crabs that were fed pieces of infected tissues and examined for evidence of infection at time periods from 1 to 48 h and for the general state of their health after 4 d. During the first 16 h after feeding, Hematodinium sp. was found in the gut, followed by large increases in hemolymph hemocytes and the appearance of hemocytic nodules in tissues. By 16 h, the hemocytic nodules appeared poorly circumscribed and disorganized. No nodules were seen in a heavily infected crab after 24 h. By the end of the 48 h after feeding, 73% (11 of 15) of the crabs had shown evidence of infection with Hematodinium sp. Those crabs with infection intensities (Hematodinium sp. as percent of cells in hemolymph) higher than 20% were dead within 4 d.