• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Comparative parasitology >Susceptibility of Tubifex tubifex (Annelida: Oligochaeta: Tubificidae) from the Rock Creek Drainage of West Central Montana, U.S.A., to Myxobolus cerebralis (Myxozoa: Myxosporea: Myxobolidae), the Causative Agent of Salmonid Whirling Disease
【24h】

Susceptibility of Tubifex tubifex (Annelida: Oligochaeta: Tubificidae) from the Rock Creek Drainage of West Central Montana, U.S.A., to Myxobolus cerebralis (Myxozoa: Myxosporea: Myxobolidae), the Causative Agent of Salmonid Whirling Disease

机译：鲑鱼旋风病的致病原

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

abstract: The objective of this study was to determine whether the low prevalence of Tubifex tubifex. infected with Myxobolus cerebralis in a Montana stream was due to a large percentage of worms being resistant to the parasite or whether other factors were involved. For this, specimens of T. tubifex were collected from various localities throughout the Rock Creek drainage of west central Montana, U.S.A., a stream known to be heavily contaminated with M. cerebralis, the causative agent of salmonid whirling disease. The natural occurring prevalence of infection was determined, and then noninfected worms were exposed to myxospores of M. cerebralis under controlled, laboratory conditions. Results showed that the percentage of noninfected T. tubifex that became infected with M. cerebralis was always greater than the percentage of naturally infected worms found at the same locality. Further, T. tubifex susceptible to infection were found at localities where no naturally infected worms were recovered. However, the prevalence of infection was low in both groups and did not exceed 4.1% for naturally infected T. tubifex or 19.0% for experimentally infected worms. In comparison, a control group of highly susceptible T. tubifex from California, U.S.A., had a 72-88% prevalence of infection after laboratory exposures to myxospores of M. cerebralis. Therefore, it appears that a large percentage of T. tubifex in Rock Creek are resistant to infection, although the mechanism of resistance is not known.
机译：摘要：本研究的目的是确定Tubifextubifex的患病率是否较低。在蒙大拿州流中感染了Myxobolus brainis的病毒是由于很大比例的蠕虫对这种寄生虫具有抗性或是否涉及其他因素。为此，从美国西部蒙大拿州中西部的Rock Creek排水渠各处收集了T.tubifex的标本，该溪流被已知严重污染了鲑鱼回旋病的致病菌脑炎支原体。确定感染的自然发生率，然后将未感染的蠕虫在受控的实验室条件下暴露于脑炎支原体的黏孢子孢子。结果表明，感染了脑炎支原体的未感染T.tubifex的百分比始终大于在相同位置发现的自然感染蠕虫的百分比。此外，在没有发现自然感染的蠕虫的地方发现了易感染的T.tubifex。但是，两组的感染率都很低，自然感染的T.tubifex感染率不超过4.1％，实验感染的蠕虫感染率不超过19.0％。相比之下，来自美国加利福尼亚州的高度敏感的T.tubifex对照组在实验室暴露于脑分枝杆菌的粘孢子后感染率为72-88％。因此，尽管抗药性的机制尚不清楚，但似乎在罗克克里克的大部分T.tubifex对感染具有抗药性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号