Brazilian authorities hope to determine by Tuesday whether a confirmed outbreak of highly pathogenic avian influenza among wild birds in a zoo in the southern state of Rio Grande do Sul is connected with the country's first bird flu case on a commercial poultry farm in the same state,

SAO PAULO — Brazil, the world's largest chicken exporter, ruled out three of seven suspected cases of highly pathogenic avian influenza, commonly known as bird flu, officials told a press conference on Monday (May 19),

Brazil, the world's largest chicken exporter, is currently investigating six potential outbreaks of highly pathogenic avian influenza, known as bird flu, according to updated data on the Agriculture Ministry's website.