The air sac system is a vital part of the avian respiratory system. Air sacs are thin-walled structures, one to two cell layers thick, that extend throughout the body cavity and into the wing and ...

Symptoms can include coughing and sneezing, loss of appetite, diarrhea, declining egg production and fertility, and nervous ...

The highly pathogenic H5N1 avian influenza virus ... capable of causing severe damage beyond the respiratory system. A groundbreaking study conducted by researchers at the University of Pittsburgh ...

Avian and human flu viruses seem to target different regions of a patient's respiratory tract. Although more than 100 people have been infected by H5N1 influenza A viruses, human-to-human ...

At least four cattle herds in Nevada have tested positive for a strain of H5N1 bird flu never before seen in cows, state agriculture officials confirmed Wednesday, and respiratory symptoms like ...

Bird flu, or avian influenza, is a viral infection spread from bird to bird. The most common kind is the H5N1 strain. While swine flu isn't as scary as it seemed a few years ago, it's still ...

Canada’s colder weather goes hand-in-hand with respiratory virus season ... about the evolution of avian flu and where we stand today. Below, Jennifer answers some of our most pressing questions ...