US health authorities announced on Thursday that further tests carried out on samples taken from the ducks in Ohio revealed the fact that the birds did not carry a bird flu virus. However, US officials say it is likely that more low pathogenic occurrences of avian influenza will be found in the following months, as a large number of tests will be carried out on wild birds. Such low risk strains of bird flu are common in the United States, say scientists and this week alone, 12 samples from 6 different states have revealed traces of mild bird flu virus.
