"Cooperia"不是一个国家名，它实际上是一种线虫属的名称。这个词语是拉丁语单词“cooperare”的变形，意为“合作”。在生物学的学科中，Cooperia是一种常见的肠道寄生线虫属，可以感染家畜和野生动物。
以下是9个含有Cooperia的国际例句：
1. The prevalence of Cooperia oncophora in cattle is increasing in certain regions of the world. (牛的Cooperia oncophora感染率在世界某些地区持续上升。)
2. The life cycle of Cooperia punctata is similar to that of other small ruminant parasitic nematodes. (Cooperia punctata的生命周期与其他小反刍动物寄生线虫相似。)
3. A single treatment with moxidectin is effective against Cooperia spp. in sheep. (单次使用莫西地克汀可以有效治疗绵羊的Cooperia spp感染。)
4. Cooperia curticei is a common parasite in wild deer populations. (Cooperia curticei是野生鹿群体中常见的寄生虫。)
5. The development of resistance to avermectin drugs in Cooperia spp. is a growing concern. (Cooperia spp.对阿维菌素药物的抵抗性发展成为一个日益严峻的问题。)
6. The economic impact of Cooperia spp. on livestock production can be significant. (Cooperia spp.对畜牧业生产的经济影响可能很大。)
7. The use of anthelmintics can help control the spread of Cooperia spp. in sheep flocks. (使用驱虫剂可以帮助控制绵羊群体中Cooperia spp的传播。)
8. The morphology of Cooperia spp. has been extensively studied under electron microscopy. (Cooperia spp.的形态学在电镜下得到了广泛研究。)
9. The prevalence of Cooperia oncophora infections in dairy cows peaks in autumn and winter. (乳牛Cooperia oncophora感染的流行率在秋冬季节达到高峰。)
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