The results of genetic tests suggested that Brazil's first outbreak of bird flu on a commercial poultry farm in the state of Rio Grande do Sul shares the strain with cases in zoo animals in the same state,

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.

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.