Ahead of the Rio Olympics, a foreign invader is linked to an outbreak of birth defects in Brazil


“It went from literally undetectable levels (of the gene) to close to 100 per cent,” said senior author William Black, an A. aegypti researcher with Colorado State University. “We’re now looking at opportunities to come up with new insecticides, but that’s going to be slow and there’s no guarantee they won’t become resistant as well. That’s why the situation is so dire.”