3/18/2023 0 Comments New sticky gravid traps![]() Therefore, the existing, reactive programs lack sensitivity and proactivity, and hence lack the ability to curb dengue epidemics. Furthermore, due to the passive nature of the current surveillance system, vector control activities mainly prevent further transmission of dengue from index cases rather than eliminate the disease. Accordingly, proactive and sensitive methods which facilitate the early detection of dengue are desperately needed to pre-empt dengue outbreaks.īesides the mentioned flaws of the dengue control program, the correlations of larval indices/adult mosquito emergence with dengue cases and the proportion of people who seek medical care post-infection are poor. These are the likely reasons for the alarming rise in dengue epidemics and the struggle to control them. The fact that asymptomatic, dengue-infected individuals are able to spread the disease has also been largely ignored. Additionally, the current vector surveillance/control measures – which are the hallmark of dengue control programs in many Southeast Asian nations, including Malaysia, usually involve house-to-house larval surveys, source reductions, larviciding, and fogging, all of which are riddled with downsides like non-relevance, cost- and labor-intensiveness, lack of community participation, as well as resistance of mosquitoes to insecticides. Īt present, anti-dengue drugs are not available, while dengue vaccine is not efficacious enough to act as a standalone intervention. Subsequently, within the first ten weeks of 2019, Selangor accounted for more than half (16748) of the 28 936 dengue cases in Malaysia. During the same year, the state of Selangor reported the highest number of cases (45 349 cases) and deaths (41 deaths). In Malaysia, a total of 80 615 cases of dengue with 147 deaths were reported in 2018. Globally, some 390 million dengue cases occur annually, 96 million of which are clinically apparent. albopictus) are the vectors of the disease. Whereas other outcome measures include the change in density threshold of Aedes and changes in dengue-related knowledge, attitude and practice among cluster inhabitants.ĭengue is a major mosquito-borne viral disease worldwide, especially in the tropical and sub-tropical countries. The primary outcome concerns the the percentage change in the (i) number of dengue cases and (ii) durations of dengue outbreaks. When a dengue-positive mosquito is detected, the community will be advised to execute vector search-and-destroy and protective measures. GOS traps are set at the apartments to collect Aedes weekly, following which dengue NS1 antigen is detected in these mosquitoes. ![]() Eight residential apartments were randomly assigned into intervention and control arms. A parallel, cluster, randomized controlled, interventional trial is being conducted for 18 months in Damansara Damai, Selangor, Malaysia, to determine the efficacy of using gravid oviposition sticky (GOS) trap and dengue non-structural 1 (NS1) antigen test for early surveillance of dengue among Aedes mosquitoes to reduce dengue outbreaks.
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