Considering the biological practice during viral or microparasitic
infection [3, 9-11], we proposed a viral infection model with general contact rate between susceptible cells and virus particles, which is a generalization of the basic viral infection model [7, 8].
Once the disease's structure is determined and the values of the parameters are known, it is possible to calculate the maximum equilibrium prevalence of a mosquito-borne microparasitic infection.
It may be argued that malaria is not exactly a good example of a microparasitic infection.
Everything said, the human species may still be unable to rid the earth of macroparasitic states, just as it may never eliminate all microparasitic
Longitudinal studies on several ponds showed that microparasitic
infections in Daphnia are mainly found among large, adult hosts (Stirnadel and Ebert 1997), suggesting that adult life span is the crucial factor determining the average life span of a parasitic infection.
Experiments reported in  strongly suggested that the infection rate of microparasitic
infections is an increasing function of the parasite dose and is usually sigmoidal in shape (see, e.g., ).
However, for some parasite-host models, by observing macro- and microparasitic
infections, one finds that the infection rate is an increasing function of the parasite dose, usually sigmoidal in shape [10, 11].