Air-sac disease – Definition & Meaning

Air-sac disease is a respiratory illness that affects birds, particularly domesticated poultry. It is a highly contagious disease that can spread rapidly among flocks, causing significant economic losses to the poultry industry. In this article, we will explore the definition and meaning of air-sac disease, its origin, associations, synonyms, antonyms, and example sentences.


Air-sac disease is a viral infection that affects the respiratory system of birds. It is caused by the Avian pneumovirus, also known as Turkey rhinotracheitis virus. The virus attacks the air sacs in the lungs of birds, leading to inflammation and fluid accumulation. This results in respiratory distress, coughing, and sneezing. The disease can also lead to a decrease in egg production and poor growth rates in birds.


Air-sac disease was first identified in the United States in the 1970s. It is believed to have originated in Europe and spread to other parts of the world through the international trade of poultry. The disease is now widespread in many countries, including the United States, Canada, and the United Kingdom.

Meaning in different dictionaries

According to the Merriam-Webster dictionary, air-sac disease is defined as “a respiratory disease of poultry marked by inflammation of the air sacs and caused by a pneumovirus.”
The Oxford dictionary defines air-sac disease as “a viral infection of domestic poultry, characterized by inflammation of the air sacs and respiratory distress.”


Air-sac disease is associated with the poultry industry, particularly with domesticated poultry such as chickens and turkeys. It is a significant concern for poultry farmers as it can cause significant economic losses due to decreased egg production and poor growth rates.


Some synonyms of air-sac disease include avian pneumovirus, turkey rhinotracheitis, and swollen head syndrome.


There are no antonyms of air-sac disease as it is a specific disease with no opposite or reverse meaning.

The same root words

The same root words as air-sac disease include air, sac, and disease.

Example Sentences

  1. The poultry farm was hit hard by air-sac disease, resulting in a significant decrease in egg production.
  2. The veterinarian diagnosed the sick chicken with air-sac disease and prescribed antibiotics.
  3. The farmer took preventive measures to protect his flock from air-sac disease by ensuring proper ventilation and sanitation.
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