Health · Public Health & Disease · 9 hrs ago
Wolbachia mosquito programme expands in Brazil but faces regulatory delays
Brazil is using Wolbachia-carrying mosquitoes to reduce dengue spread by releasing them into local communities.
The programme began in Jurujuba, a neighbourhood in Niterói, and now operates in 16 municipalities covering 16 million people.
Wolbachia is a bacterium that blocks dengue virus replication in mosquitoes, and offspring of released mosquitoes also carry it.
Pilot studies found dengue cases fell by 69% in Niterói after two years and by 63% in Campo Grande.
The method could help lower dengue cases, but transmission can continue and the programme faces regulatory bottlenecks.
Brazil plans to add 54 municipalities next year, reaching 7.2 million more people.
Brazil’s Wolbachia mosquito programme operates in 16 municipalities, covering an area with 16 million residents, according to the Ministry of Health.
The programme uses Aedes aegypti mosquitoes carrying Wolbachia, a bacterium that blocks dengue virus replication.
A pilot study in Niterói found dengue cases fell 69% two years after releases began and nearly 90% after five years.
The country can produce 340 million Wolbachia mosquito eggs per week, but regulatory bottlenecks remain.
The Ministry of Health plans to add 54 municipalities from next year, reaching another 7.2 million people.
- Who
- Brazil’s Ministry of Health and the Fiocruz–World Mosquito Program partnership are involved in the programme.
- What
- Brazil is expanding releases of Aedes aegypti mosquitoes carrying Wolbachia to reduce dengue transmission, while facing regulatory bottlenecks.
- When
- The first Brazilian releases began between August 2015 and January 2016. The Ministry plans to add municipalities from next year.
- Where
- The programme began in Jurujuba, a neighbourhood of Niterói, Rio de Janeiro state; releases now take place in 16 municipalities.
- Why
- Wolbachia blocks dengue virus replication in mosquitoes and can reduce transmission to humans.
This story does not have two clearly opposing sides.
The first Brazilian releases of Wolbachia-infected Aedes aegypti mosquitoes took place in Jurujuba, Niterói.
The programme’s coverage reached the whole city of Niterói.
Wolbachia was included in Brazil’s national health guidelines, according to Luciano Moreira.
The Ministry of Health plans to add 54 municipalities to the programme.
- Current coverage
- 16 municipalities and an area with 16 million residents
- Planned expansion
- 54 additional municipalities and 7.2 million more people
- Investment so far
- R$117 million
- Production capacity
- 340 million mosquito eggs per week nationally
- Niterói pilot result
- Dengue cases fell 69% after two years and nearly 90% after five years
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What people are saying
In 2024, we had the turning point when Wolbachia entered the national health guidelines, moving out of the academic context and becoming public policy.