[Observation on the intake of Brugia malayi microfilariae by Anopheles sinensis and host efficiency]

The experiments were carried out under the controlled conditions with temperature at 26 +/- 1 degree C and relative humidity 75-85%. The Brugian microfilariae from the peritoneal cavity of Mongolian jirds, mixed with rabbit blood, were ingested by Anopheles mosquitoes through the artificial membrane. The experimental data show that the number of microfilariae ingested is fewer than would be expected from the microfilarial densities in the blood meal. The linear regression shows their quantitative relation, Y = 0.61X-1.37. At the same time the host efficiency of Anopheles sinensis decreases with the increase of microfilarial number ingested. In case of the relationship between Brugia malayi and Anopheles sinensis, the survival rate of vector host is the chief factor influencing the decrease of host efficiency.