[Preliminary estimation of malaria transmission potential in areas where Anopheles sinensis is the only vector]

The data, vectorial capacity of Anopheles sinensis in the suburb of Jining city, Shandong Province in 1975, in 1980-1984, and the average gland infection rate of Anopheles sinensis infected with Plasmodium vivax artificially, were calculated by using Macdonald formula (1957). The basic reproduction rates were 4.44, 6.47 and 4.25 in the years 1975, 1980 and 1981, respectively. In 1982-1984, the rate was reduced to 0.69, 0.41 and 0.1, respectively. Since 1982, the incidence rate of malaria in the areas was reduced by 80% annually, indicating that the malaria transmission had been decreased obviously.