MONTENEGRO, Brazil - Officials and chicken farmers in Brazil have stepped up sanitary controls close to where the country's first case of avian influenza was found on a commercial farm, while racing to track the virus to stop its spread.

Brazil, one of the world’s largest producers and exporters of poultry, has confirmed the country’s first bird flu outbreak on a commercial farm.

A drone view shows the installations of Vibra Foods, a Brazilian operation backed by Tyson Foods TSN.N, after Brazil's first outbreak of bird flu was identified at a poultry farm supplying Vibra Foods, in Montenegro, Brazil May 16, 2025. The writing on the sign reads " Naturally healthy wonderfully." REUTERS/Diego Vara