[Risk for humans and animals by excretion of helminth eggs]

In presence of large human and animal populations on a small area potential danger is given for frequent occurrence of helminth infections. Important helminthosis of men and animals in Middle Europe are represented, particularly the correlations between hosts and parasitic agents in epidemiological point of view. The represented helminth species are such of man as final host which are dangerous for men and animals, and such of animals which are dangerous also for both man and animals. On the one hand there is a lot of new scientific findings, on the other hand there are gaps in knowledge, concerning species of nematodes, cestodes and trematodes with reference to living expectancy, reproduction potential, duration and dynamic of elimination as well as resistance of exogenous helminth stages and finally methods for proof of pathogens in the biotope as a requirement for purposeful control with ecologically acceptance.