Brazil's state of Tocantins has ruled out the occurrence of highly pathogenic avian influenza, known as bird flu, in a local commercial farm citing preliminary test results, according to a statement sent to Reuters on Wednesday.

Officials said eggs produced after the onset of illness did not enter the food supply, and there are no signs of illness in humans.

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