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Larval Occurrence and Climatic Factors Affecting DHF Incidence in Samui Islands,
BibTeX
@MISC{Wongkoon_larvaloccurrence,
author = {S. Wongkoon and M. Jaroensutasinee and K. Jaroensutasinee and W. Preechaporn and S. Chumkiew},
title = {Larval Occurrence and Climatic Factors Affecting DHF Incidence in Samui Islands,},
year = {}
}
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Abstract
Abstract—This study investigated the number of Aedes larvae, the key breeding sites of Aedes sp., and the relationship between climatic factors and the incidence of DHF in Samui Islands. We conducted our questionnaire and larval surveys from randomly selected 105 households in Samui Islands in July-September 2006. Pearson’s correlation coefficient was used to explore the primary association between the DHF incidence and all climatic factors. Multiple stepwise regression technique was then used to fit the statistical model. The results showed that the positive indoor containers were small jars, cement tanks, and plastic tanks. The positive outdoor containers were small jars, cement tanks, plastic tanks, used cans, tires, plastic bottles, discarded objects, pot saucers, plant pots, and areca husks. All Ae. albopictus larval indices (i.e., CI, HI, and BI) were higher than Ae. aegypti larval indices in this area. These larval indices were higher than WHO standard. This indicated a high risk of DHF transmission at Samui Islands. The multiple stepwise regression model was y = –288.80 + 11.024xmean temp. The mean temperature was positively associated with the DHF incidence in this area. Keywords—Dengue vectors, Aedes aegypti, Aedes albopictus,
Keyphrases
samui island larval occurrence climatic factor affecting dhf incidence climatic factor plastic tank dhf incidence cement tank small jar aedes larva keywords dengue vector multiple stepwise regression model plant pot pot saucer plastic bottle areca husk aegypti larval index primary association positive indoor container aedes sp key breeding site high risk larval index positive outdoor container statistical model albopictus larval index dhf transmission multiple stepwise regression technique aedes aegypti mean temperature aedes albopictus larval survey pearson correlation coefficient
