The impact of avian flu and related restrictions - after the first case was confirmed in Nottinghamshire - has been described as "heartbreaking". Wide-ranging controls have been ordered after a highly infectious strain of the disease was detected in UK birds.

It is not yet clear how much of an impact these rising cases of bird flu could have on costs. As experts have said, if cases continue to surge, there could be ripple effects through the market, reaching the prices consumers pay for certain products in grocery stores.

Nearly two million U.S. turkeys have died from bird flu in recent months. An agricultural economist explains what ongoing outbreaks could mean for Thanksgiving meals

Migrating wild birds are spreading the virus to domesticated flocks, increasing the risk of eventually seeing a human outbreak. Scientists are troubled by the muted federal response.

Cornell scientists discover that the H5N1 virus survives for up to 120 days in raw milk cheese, which contravenes health regulations.

The world's largest species of seal has been devastated by bird flu, which has wiped out half of all breeding females at a key wildlife haven near Antarctica, scientists warned Thursday.