Parasitic infection reduces dispersal of ciliate host
Parasitic infection reduces dispersal of ciliate host
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DOI：
10.1098/rsbl.2010.0862
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发表时间：
2011-06-23
期刊：
影响因子：
3.3
通讯作者：
Kaltz, Oliver
中科院分区：
文献类型：
--
作者：
Fellous, Simon;Quillery, Elsa;Kaltz, Oliver
寄生虫感染会改变宿主的移动性，进而影响其扩散能力。我们利用纤毛虫尾草履虫及其细菌寄生虫波豆虫状全孢螺菌对这一观点进行了实验研究。我们比较了在相互连接的微观世界中受感染和未受感染种群的短距离扩散情况。感染降低了扩散宿主的比例，且在不同宿主克隆之间水平有所差异。宿主种群密度越高，扩散性越低，这可能是由于社会聚集行为。对宿主种群消耗最大的寄生虫分离株对宿主扩散的影响最小。寄生虫引起的扩散改变可能会对疾病的空间分布、宿主和寄生虫的遗传种群结构以及协同进化产生影响。
Parasitic infection can modify host mobility and consequently their dispersal capacity. We experimentally investigated this idea using the ciliate Paramecium caudatum and its bacterial parasite Holospora undulata. We compared the short-distance dispersal of infected and uninfected populations in interconnected microcosms. Infection reduced the proportion of hosts dispersing, with levels differing among host clones. Host populations with higher densities showed lower dispersal, possibly owing to social aggregation behaviour. Parasite isolates that depleted host populations most had the lowest impact on host dispersal. Parasite-induced modification of dispersal may have consequences for the spatial distribution of disease, host and parasite genetic population structure, and coevolution.