Miami releases bacteria-infected mosquitos to help prevent Zika Miami is releasing millions of male mosquitos infected with a naturally-occurring bacteria in order help stop the spread of Zika virus. When the non-biting male mosquitos mate with wild female mosquitos, their offspring will not make it to adulthood, driving down the population of these insects which are prone to carrying viruses like Zika, dengue fever and chikungunya. IMAGES AND SOUNDBITES