The hope is they will multiply, breed and become the majority of mosquitoes, thus reducing cases of the disease.
The initiative is part of a programme also taking place in Australia, Vietnam and Indonesia.
The intracellular bacteria, Wolbachia, being introduced cannot be transmitted to humans.
The programme started in 2012 says Luciano Moreira of the Brazilian research institute Fiocruz, who is leading the project in Brazil .... http://www.bbc.com
