Dengue Hemorrhagic Fever has been a major problem in public health in Thailand since 1958. In the year 2002, a total of 93,131 cases of DHF, with 139 deaths was reported by the Division of Epidemiology, Ministry of Public Health. Aedes aegypti Linnaeus plays a crucial role in the transmission of this viral disease (Nogueira et al., 1999). Ae. aegypti is highly anthropophilic and thrives in close proximity to humans and often lives indoors. They usually feed during the day, once in mid morning and again in the late afternoon. Although vaccination would be an ideal method to control DHF, development of vaccines for dengue viruses is in progress and their trials have been slow. Moreover there are some difficulties in application of vaccine trials owing to the live only method in addition to clinical case management available to control DHF. Permanent control of Ae. aegypti must be by the destruction of the mosquitoûs breeding sites. However, for immediate local control of epidemic transmission of DHF, it is very important to carefully plan for vector control by using insecticides against larvae and adult mosquitoes.
Dengue Hemorrhagic Fever has been a major problem in public health in Thailand since 1958. In the year 2002, a total of 93,131 cases of DHF, with 139 deaths was reported by the Division of Epidemiology, Ministry of Public Health. Aedes aegypti Linnaeus plays a crucial role in the transmission of this viral disease (Nogueira et al., 1999). Ae. aegypti is highly anthropophilic and thrives in close proximity to humans and often lives indoors. They usually feed during the day, once in mid morning and again in the late afternoon. Although vaccination would be an ideal method to control DHF, development of vaccines for dengue viruses is in progress and their trials have been slow. Moreover there are some difficulties in application of vaccine trials owing to the live only method in addition to clinical case management available to control DHF. Permanent control of Ae. aegypti must be by the destruction of the mosquitoûs breeding sites. However, for immediate local control of epidemic transmission of DHF, it is very important to carefully plan for vector control by using insecticides against larvae and adult mosquitoes.
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