Gregarine infection accelerates larval development of the cat flea Ctenocephalides felis (Bouche)
Gregarine infection accelerates larval development of the cat flea Ctenocephalides felis (Bouche)
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DOI：
10.1017/s0031182016002122
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发表时间：
2017-04-01
期刊：
影响因子：
2.4
通讯作者：
Slamovits, C. H.
中科院分区：
文献类型：
--
作者：
Alarcon, M. E.;Jara-F, A.;Slamovits, C. H.
宿主和寄生虫之间高度的专业化是一个众所周知的共同进化的长期历史的结果，它是引人注目的说明在他们的生活周期的协调。在某些情况下，在建立共生关系时随之而来的军备竞赛导致寄生虫采取操纵策略。本文报道了猫栉头虫（Steininactenocephali）的物候和变态。尽管有这些发现，但它们的共生伙伴关系（互利、寄生或共生）的结果仍不清楚。为了解决这个重要的问题，我们测量的生活史参数的跳蚤在实验室条件下，存在不同的感染强度gregarine卵囊。我们发现，无论是出现或存活率的跳蚤是受窝藏gregarines。更令人惊讶的是，我们的研究结果表明，跳蚤幼虫感染gregarines发展更快，出现早于对照组。因此，这gregarine加入了选定的一组原生生物，可以修改生理宿主性状，不仅提供了新的模式分类群，以探索在进化的情况下，但猫蚤的控制策略的潜在发展。
A high degree of specialization between host and parasite is a well-known outcome of a long history of coevolution, and it is strikingly illustrated in a coordination of their life cycles. In some cases, the arms race ensued at the establishment of a symbiotic relationship results in the adoption of manipulative strategies by the parasite. We have already learned that Steinina ctenocephali, a gregarine living in the alimentary canal of cat flea, Ctenocephalides felis follows its phenology and metamorphosis. Despite these findings the outcome of their symbiotic partnership (mutualist, parasitic or commensal) remains unclear. To address this important question, we measured life history parameters of the flea in the presence of varying infection intensities of gregarine oocysts in laboratory conditions. We found that neither the emergence nor survival rate of fleas was affected by harbouring the gregarines. More surprisingly, our results show that flea larvae infected with gregarines developed faster and emerged earlier than the control group. This gregarine therefore joins the selected group of protists that can modify physiological host traits and provides not only new model taxa to be explored in an evolutionary scenario, but also potential development of control strategies of cat flea.