Surveillance of Dengue Fever Vector Aedes aegypti in Different Areas in Jeddah City Saudi Arabia

Abstract

The seasonal abundance of adult mosquitoes in Jeddah city was investigated throughout the year, 2010. Light traps (black holes) and manual methods were used for collecting adults and immature stages in five residential areas in Jeddah. A total of 796 adults of Aedes aegypti mosquitoes were collected. Out of these, 373 males (46.8 %) and, 423 females (53.2%). Out of 950 collected immature stages, 83.41% larvae and 16.6% were pupae. The obtained statistical analysis showed that the availability of the adult and juvenile stages of A. aegypti occurred throughout the year in different densities depending on the climatic conditions and the effectiveness of the breeding sites. The density of adult were 2.61 (Ghuleel), 2.55 (Al-Jameiah), 2.25 (Al-Balad), 2.47 (Al-Safa) and 1.86 (Al-Nazlah Al -Yamaneyyah). Whereas the density of immature stages were 5.03 (Ghuleel), 4.01 (Al-Balad), 2.48 (Al-Jameiah), 2.38 (Al-Safa) and 1.91 (Al-Nazlah Al-Yamaneyyah) at the level of significance (P< 0.05). The density of immature stages of A. aegypti in March, April, May, and December has shown a significant increase. Two peaks for the seasonal abundance of the adults were showed in April, January, October and December, because of the optimum climatic condations (temperature and humidity) in those months