病毒性支气管炎是由很多普通病毒引起，包括流感病毒。
Viral bronchitis may be caused by a number of common viruses, including the influenza virus.
病毒性急性支气管炎，通常咳出少量白色粘液痰。
With viral bronchitis, small amounts of white mucus are often coughed up.
感染性支气管炎，也是由细菌引起，细菌性支气管炎常伴发病毒性上呼吸道感染。
Infectious bronchitis may also be caused by bacteria. Often bacterial bronchitis follows a viral upper respiratory infection.
新城疫(ND)和传染性支气管炎(IB)一直是危害我国养禽业的两大重要病毒性传染病。
Newcastle disease (nd) and Avian infectious bronchitis (IB) are both very important viral infectious diseases that endanger seriously the raising-chickens' industries in our country all along.
禽传染性支气管炎(IB)呈世界广泛流行，是危害养鸡生产最严重的病毒性传染病之一。
Infectious bronchitis virus (IBV) is a world-wide viral disease of poultry, which poses a major economic threat to the poultry industry.
禽传染性支气管炎(IB)呈世界广泛流行，是危害养鸡生产最严重的病毒性传染病之一。
Infectious bronchitis virus (IBV) is a world-wide viral disease of poultry, which poses a major economic threat to the poultry industry.
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