Brazil, the world's largest chicken exporter, on Friday reported its first case of highly pathogenic avian influenza - also known as bird flu - on a commercial farm, triggering fears over global poultry supply chains.

SAO PAULO (Reuters) -Brazil on Friday confirmed its first case of the highly contagious bird flu virus on a commercial chicken farm in the south of the nation, triggering a temporary trade ban from its main trade partner China. *Brazil is the world's largest meat exporter and second largest producer behind the United States.