AI Article Synopsis
- Two insular settlements in Malaysia were studied to understand the population dynamics of dengue and chikungunya mosquito vectors, Aedes aegypti and Aedes albopictus, through ovitrap monitoring conducted over a year.
- The study found that increased rainfall negatively impacted the ovitrap index shortly after collection but was positively associated with higher mosquito activity 25 days later, indicating a delayed response to environmental changes.
- Two peaks in mosquito activity were observed; the first aligned with the egg hatching cycle and the second minor peak was likely related to a subsequent reproductive cycle of the female mosquitoes.
Article Abstract
Two insular settlements (Kampung Pulau Ketam and Kampung Sungai Lima) were selected to study the population dynamics of Aedes aegypti and Aedes albopictus mosquitoes, vectors of dengue and chikungunya infections. Ovitrap surveillance was conducted between October 2007 and October 2008. There was an inverse negative association between ovitrap index and rainfall at the time of collection, probably because rainfall increased the number of available oviposition sites. Rainfall and ovitrap index were positively associates the 25th day after rainfall occurred. A minor, second peak was observed from the 38th to the 42nd day. The first peak was consistent with the minimum 18-day period between the hatching of eggs to the first oviposition. The second minor peak could be due to the second gonotrophic cycle of the female mosquitoes. Rainfall is an important environmental factor associated with Aedes breeding at the study sites.
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Relationship between rainfall and Aedes larval population at two insular sites in Pulau Ketam, Selangor, Malaysia.
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Article Synopsis
- Two insular settlements in Malaysia were studied to understand the population dynamics of dengue and chikungunya mosquito vectors, Aedes aegypti and Aedes albopictus, through ovitrap monitoring conducted over a year.
- The study found that increased rainfall negatively impacted the ovitrap index shortly after collection but was positively associated with higher mosquito activity 25 days later, indicating a delayed response to environmental changes.
- Two peaks in mosquito activity were observed; the first aligned with the egg hatching cycle and the second minor peak was likely related to a subsequent reproductive cycle of the female mosquitoes.
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