Mosquitoes, Mansonia indiana Edwards, 1930, were collected from non-endemic area of human lymphatic filariasis and tested for their susceptibility of infection using nocturnally subperiodic Brugia malayiBuckley & Edeson, 1956. Three cats naturally infected with B. malayi were used in the experiment for mosquitoes feeding. The data revealed that the susceptibility of mosquito infection ranged from 30 to 70%. The results also revealed that the susceptibility rates were not linearly correlated to the microfilarial densities in the cat at the time of feeding. The microfilarial density in cats ranged from 15 to 27 per 10 μl of blood whereas the mean number of third stage larvae in the infective mosquitoes ranged from 21.6 to 26.8. In addition, statistical analysis showed no significant difference (P > 0.05) between the mean number of third-stage larvae in mosquitoes and the density of microfilaria in cats. The study indicated that Ma. indiana, collected from non-endemic areas, is capable for transmitting the nocturnally subperiodic B. malayi.
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Vol. 39 • No. 1