Mating for schistosomes.

A mathematical model for schistosomiasis is developed under the hypothesis of promiscuous mating between mature schistosomes. The model is used to study epidemiology, control, and eradication of schistosome infections. Comparisons are made with previously published models that deal with monogamous mating and with parthenogenesis. We find that the two modes of mating give results that are essentially similar. On the other hand, essential differences exist between either mode of mating and the parthenogenetic case. Thus, we conclude that it is not of essential importance to find out if mature schistosomes are monogamous or promiscuous. A second conclusion is that the simplifying assumption of parthenogenetic egg-laying of schistosomes is not acceptable.