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Modified mosquitoes bring much hope in dengue-endemic Indonesia

Ardila Syakriah (The Jakarta Post)
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Jakarta
Tue, September 1, 2020

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Modified mosquitoes bring much hope in dengue-endemic Indonesia A doctor checks on a toddler infected by dengue fever at TC Hillers General Hospital in Maumere, Sikka regency, East Nusa Tenggara, on March 10, 2020. (Antara/Kornelis Kaha)

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n Indonesia, where dengue remains endemic, recent trial results suggesting that releasing mosquitoes carrying a certain bacteria could lead to a 77 percent reduction of dengue cases have brought much hope.

Researchers from the World Mosquito Program (WMP) of Australia’s Monash University, along with Indonesian partner Gadjah Mada University (UGM), have deployed Wolbachia-infected mosquitoes in Yogyakarta as part of a randomized controlled trial that started in 2017.

Wolbachia is a bacterium that competes with viruses like dengue, making it harder for viruses to reproduce inside mosquitoes, thus reducing their ability to transmit dengue to humans. The bacteria naturally exists in 60 percent of insect species, but not in Aedes aegypti, the main transmitter of dengue and several other viruses.

The researchers announced recently that the trial results had shown "a 77 percent reduction in the incidence of virologically confirmed dengue in Wolbachia-treated areas of Yogyakarta [...] compared to untreated areas" over a 27-month period.

"The number is astounding for an infectious disease, given that there is, quote and quote, no medicine for dengue," WMP Indonesia principal investigator and UGM professor Adi Utarini said.

"We hope that this can be a new tool with a proven efficacy to complement dengue control efforts, especially in prevention. It appears that existing [prevention programs] haven't been enough to reduce dengue cases.”

As of early July, Indonesia has recorded 71,633 dengue cases and 459 deaths, with West Java, Bali, East Java, East Nusa Tenggara (NTT), Lampung, Jakarta, West Nusa Tenggara (NTB), Central Java, Yogyakarta and Riau bearing the most cases.

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