前段时间有位鸽友来到我这里为鸽子做例行检查。他的鸽子已经使用高剂量的10%罗尼嘧唑(ronidazole)连续进行了8天的治疗，但是经过检查发现，鸽子仍然有大量的毛滴虫！

Most medicines for internal use, however they are administered (by mouth, injection, spraying), have to be absorbed from the point at which this occurs, i.e. have to travel further in order to reach the appropriate organ or organs. There are clear differences in the way the various active ingredients are absorbed, and to ignore these can cause treatment to be unsuccessful.