[Proposal on standardization of parasitic cycles].

The author proposes to unify the schemes of the development and the cycles of the diverse parasitic organisms. The definite hosts (as well as the mature stages) should always be put on the right side, but the larval stages and the intermediate hosts on the left. By this procedure, some terms get unnecessary and the stages and cycles become comparable. This enables to make more clear some epidemiological questions (blind routes etc.). Furthermore it makes teaching in schools and colleges easier, also in health training. Furthermore it promotes international understanding.