cercaria

简明释义

英[sɜːˈkeərɪə]美[sərˈkerɪə]

n. [无脊椎] 尾蚴，摇尾幼虫

复 数 c e r c a r i a e

英英释义

单词用法

同义词

反义词

例句

1.The morphological characteristics of the cercaria are described.

同时对尾蚴形态特征作了描述。

2.Objective To evaluate the protective effect and acute skin irritating reaction of anti cercaria emollient cream (ACEC) from infection of S.

目的实验评价新型涂肤防护剂—防蚴润肤霜防御日本血吸虫尾蚴感染的效果，并了解其对皮肤的急性刺激反应。

3.With the action time of the drug extending, the mortality of cercaria increased(P<0.01).

不同剂量组的尾蚴平均死亡率均随着药物作用时间的延长而增大（P<0.01）。

4.Objective To evaluate the protective effect and acute skin irritating reaction of anti cercaria emollient cream (ACEC) from infection of S.

目的实验评价新型涂肤防护剂—防蚴润肤霜防御日本血吸虫尾蚴感染的效果，并了解其对皮肤的急性刺激反应。

5.Infected snails release cercaria into the water, posing a risk to swimmers.

感染的蜗牛将尾蚴释放到水中，给游泳者带来风险。

6.The life cycle of the parasite includes a stage known as cercaria, which is crucial for its transmission.

这种寄生虫的生命周期包括一个称为尾蚴的阶段，这对其传播至关重要。

7.Some species of fish are known to be hosts for cercaria larvae.

一些鱼类被认为是尾蚴幼虫的宿主。

8.Researchers are studying how cercaria can infect freshwater snails.

研究人员正在研究尾蚴如何感染淡水蜗牛。

9.The identification of cercaria in water samples indicates potential contamination.

水样中识别出尾蚴表明潜在的污染。

作文

The study of parasitology reveals a fascinating world hidden within the ecosystems we often take for granted. One of the lesser-known but intriguing stages in the life cycle of certain parasitic flatworms is the cercaria, which plays a crucial role in their transmission and survival. Understanding the biology and ecology of cercaria can provide insights into the complexities of host-parasite interactions and the implications for public health.Cercaria are free-swimming larvae that emerge from the intermediate hosts, typically snails, after undergoing several developmental stages. These larvae are equipped with a tail, which allows them to swim in aquatic environments. Their primary goal is to find a suitable definitive host, often a vertebrate, where they can mature into adult parasites. The journey of cercaria is not merely a quest for survival; it is a finely tuned process that has evolved over millions of years.Once released into the water, cercaria must navigate various challenges, including predation and environmental conditions. They rely on chemical cues to locate potential hosts, demonstrating an impressive level of adaptation. Upon encountering a suitable host, cercaria penetrate the skin or enter through other routes, depending on the species. This invasion is often asymptomatic initially, but it can lead to significant health issues in the host if left untreated.The presence of cercaria in freshwater bodies poses a risk to humans and animals alike. For instance, certain species of cercaria are responsible for schistosomiasis, a disease that affects millions worldwide. The transmission cycle highlights the importance of understanding these larvae, as controlling their population can mitigate the spread of the disease. Public health measures, such as improving sanitation and reducing snail populations in contaminated water, are essential strategies to combat the risks associated with cercaria.Research on cercaria also offers valuable insights into broader ecological dynamics. By studying their interactions with different hosts and environmental factors, scientists can better understand the balance of ecosystems and the impact of climate change on parasitic infections. The adaptability of cercaria to changing environments can serve as an indicator of ecosystem health, making them important subjects of study in environmental science.In conclusion, the cercaria represents a critical stage in the life cycle of parasitic flatworms, with significant implications for both health and ecology. By exploring the biology, transmission, and ecological roles of cercaria, we can gain a deeper appreciation for the intricate relationships within our natural world. As research continues to unfold, it becomes increasingly clear that understanding these tiny organisms is vital for addressing public health challenges and conserving biodiversity. The study of cercaria is not just about parasites; it is about understanding the interconnectedness of life and the delicate balance that sustains it.

寄生虫学的研究揭示了一个隐藏在我们常常视而不见的生态系统中的迷人世界。某些寄生扁虫生命周期中较少为人知但引人入胜的阶段是尾蚴，它在寄生虫的传播和生存中发挥着至关重要的作用。理解尾蚴的生物学和生态学可以为我们提供关于宿主-寄生虫相互作用复杂性的洞察，以及对公共健康的影响。尾蚴是从中间宿主（通常是蜗牛）中释放出来的自由游动幼虫，在经历几个发育阶段后出现。这些幼虫配备了尾巴，使其能够在水生环境中游泳。它们的主要目标是寻找合适的终末宿主，通常是脊椎动物，在那里它们可以成熟为成虫寄生虫。尾蚴的旅程不仅仅是生存的追求；这是一种经过数百万年进化而成的精细调节过程。一旦释放到水中，尾蚴必须应对各种挑战，包括捕食和环境条件。它们依靠化学线索来定位潜在的宿主，展示出令人印象深刻的适应能力。在遇到合适的宿主后，尾蚴通过穿透皮肤或通过其他途径进入体内，具体取决于物种。这种入侵最初往往是无症状的，但如果不加以治疗，可能会导致宿主出现严重的健康问题。尾蚴在淡水体中的存在对人类和动物都构成风险。例如，某些种类的尾蚴是血吸虫病的病因，这种疾病影响着全球数百万人。传播周期突显了理解这些幼虫的重要性，因为控制它们的种群可以减轻疾病的传播。改善卫生条件和减少受污染水域中蜗牛种群等公共卫生措施是应对与尾蚴相关风险的基本策略。对尾蚴的研究还提供了对更广泛生态动态的宝贵见解。通过研究它们与不同宿主和环境因素的相互作用，科学家们可以更好地理解生态系统的平衡以及气候变化对寄生虫感染的影响。尾蚴对环境变化的适应能力可以作为生态系统健康的指示器，使其成为环境科学中的重要研究对象。总之，尾蚴代表了寄生扁虫生命周期中的关键阶段，对健康和生态都有重大影响。通过探索尾蚴的生物学、传播和生态角色，我们可以更深入地理解我们自然世界中的复杂关系。随着研究的不断展开，越来越明显的是，理解这些微小生物对解决公共健康挑战和保护生物多样性至关重要。对尾蚴的研究不仅仅是关于寄生虫；而是关于理解生命的相互联系和支撑这一切的微妙平衡。