Effectiveness of a novel long-lasting pyriproxyfen larvicide (SumiLarv®2MR) against Aedes mosquitoes in schools in Yangon, Myanmar

Background Mosquito-borne diseases are prevalent in Myanmar, with the number of dengue cases showing a significant increase in recent years. Dengue vectors have developed resistance to insecticides and currently used larvicides show only short-term effectiveness. As a result, an alternative larvicid...

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Veröffentlicht in:Parasites & vectors Jg. 11; H. 1; S. 16
Hauptverfasser: Oo, Sai Zaw Min, Thaung, Sein, Maung, Yan Naung Maung, Aye, Khin Myo, Aung, Zar Zar, Thu, Hlaing Myat, Thant, Kyaw Zin, Minakawa, Noboru
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London BioMed Central 06.01.2018
BioMed Central Ltd
BMC
Schlagworte:
adults
Aedes
Analysis
Biomedical and Life Sciences
Biomedicine
Dengue
Dengue virus
Dengue viruses
Entomology
Infectious Diseases
Insecticides
Larvicide
larvicides
Mosquitoes
Myanmar
Parasitology
Pyriproxyfen
Schools
SumiLarv®2MR
Tropical Medicine
vector control
Veterinary Medicine/Veterinary Science
Virology
Myanmar
Pyriproxyfen
SumiLarv®2MR
Myanmar
Larvicide
Schools
Dengue
Aedes
ISSN:1756-3305, 1756-3305
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Zusammenfassung:Background Mosquito-borne diseases are prevalent in Myanmar, with the number of dengue cases showing a significant increase in recent years. Dengue vectors have developed resistance to insecticides and currently used larvicides show only short-term effectiveness. As a result, an alternative larvicide is urgently needed. The present study evaluated the larvicidal effectiveness of long-lasting pyriproxyfen resin discs (SumiLarv®2MR) against dengue virus vectors in schools in Hlaing Thar Yar Township, Yangon. Results The proportion of Aedes mosquito-infested containers was significantly reduced in the schools applied with the larvicide (OR: 0.24, 95% CI: 0.12–0.48) while there was little reduction noted in the control schools (OR: 0.97, 95% CI: 0.55–1.72). The density of infested containers was also significantly reduced in the intervention schools (Beta: -1.50, 95% CI: -1.98– -1.04), but there was no significant reduction in density in the control schools (Beta: -0.19, 95% CI: -0.53–0.14). The proportion of adult emergence was less than 20% in the treated water collected from the intervention schools for six months, while the proportion was over 90% in the untreated water. In addition, eight-month-old SumiLarv®2MR resin discs were still 100% effective when tested in the laboratory. More than 50% of the discs disappeared from treated containers within two months of intervention. Conclusions SumiLarv®2MR was effective in reducing Aedes -infested containers at least six months after its application in schools. This new pyriproxyfen formulation has great potential for improving the current dengue vector control program in Myanmar.
Bibliographie:ObjectType-Article-1
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ISSN:1756-3305
1756-3305
DOI:10.1186/s13071-017-2603-9