This latest outbreak is part of a broader epizootic that has swept across the United States, affecting not only poultry but also wild birds, mammals and humans.

Scientists say the temporary freeze on communications from federal officials creates a troubling blind spot for those tracking the virus.

First U.S. detection of virulent H5N9 strain, at a California duck farm, draws scrutiny as evidence of genetic reassortment that could trigger human outbreaks.

Bird flu outbreaks have contributed to rising egg prices soaring around at the country. The USDA estimates that infected flocks contribute to these rising egg prices, as the virus can reduce egg production and cause deformed shells.

Six dead swans have been found in Worcester in a case of suspected bird flu. Worcester City Council said on Tuesday evening the birds had been found along a stretch of the River Severn between the cathedral and the railway viaduct. It added that some parts of the riverside path had been closed to help reduce the spread.

A new bird flu (highly pathogenic avian influenza) outbreak has been discovered in California. The newly reported H5N9 strain was found Monday at a duck farm in Merced County, California, according to the World Organization for Animal Health.

Lithuania has reported an outbreak of highly pathogenic H5N1 avian influenza, commonly called bird flu, on a laying hen farm in the western part of the country, the World Organisation for Animal Health (WOAH) said on Wednesday.