EFFECTS OF BRUGIA MALAYI INFECTION ON THE FECUNDITY AND SURVIVAL RATE OF ANOPHELES SINENSIS / 中国寄生虫学与寄生虫病杂志

ABSTRACT

Observations were carricd out on the changes in the fecundity and the survival rate of Anopheles sinensis infected with microfilariae of Erugia malayi through an artificial membrane and maintained at 25.5?1℃ and R. H. 75-85%。Analysis of the resultant data showed that there was a significant dccrcase in egg-production in the mosquitoes infected with a density of microfilariae over 5.42mf/?l during the first gonotrophic cycle and over 2.69mf/?l during the second, with a tenden-cy of continuous decrease following the increase in microfilarial density. The results were discussed in terms of the hypothesis of "nutritional competition" suggested by Javadian et al in 1974.Four groups of mosquitoes infected with various dcnsitics of microfilariae were observed on their survival rates after exposure to microfilariae. The infected mosquitoes showed lower survival rate as compared with the control group, exhibiting a continuous decrease in the survival rate of Infected mosquitocs with the increase in microfilarial dcnsities in the blood meal engorged. This continuous change was more significant during the lst-12th day post-exposure.