The world's largest poultry exporter has declared itself free of the bird flu virus on commercial flocks after observing a 28-day period without any new commercial farm outbreaks, the Brazilian ministry of agriculture said on Wednesday.

Brazil has declared itself free from bird flu after no new cases emerged in commercial farms since the first outbreak in May, paving the way for a return to international markets for the world’s largest chicken supplier.

Brazilian authorities on Wednesday have declared the country as "free" of the bird flu virus after no new outbreaks were detected on commercial poultry farms, Reuters reported, citing a statement from the agriculture ministry.