By Debora Ely and Ana Mano MONTENEGRO, Brazil (Reuters) -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,

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, citing laboratory test results, according to Reuters.

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.