Brazil is still analyzing a new suspected case of bird flu on a commercial poultry farm, raising concerns the deadly virus may be spreading in the world’s largest chicken exporter.

Preliminary tests indicate a commercial chicken farm in Brazil's state of Tocantins is free from bird flu, the state's farm agency said on Wednesday, a reassuring result following confirmation of Brazil's first such outbreak.

The first bird flu outbreak at a poultry facility has been confirmed in Brazil, a major U.S. agricultural competitor