A highly contagious, acute viral infectious disease of the chicken. And even more abnormal breathing and excretion from the nose and cause nephritis, chick raise the reproductive developmental disabilities. The economic loss is greater because the egg rate decreases in layer. Seasonal and occurs mainly in shorter incubation period is about 18-36 hours. In particular, this disease and other respiratory diseases, such as identification of ND or ILT is not easy.
 
1. Agent
It is occurred by the IBV belonging to the Coronavirus. It brings the mortality rate in kidney and neurological depending on the virus and should not cross protection well, a lot of variation between serotypes.
 
2. Epidemiology
Occurs throughout the world and facilitates infection of secondary bacterial diseases such as E. coli, the propagation path is the excrement or infection system through the respiratory infection based infection breaking through the respiratory health system and poultry mechanism contaminated with a virus, regional transmission is propagated by egg tray transport box or by the total latent carrier.
 
3. Clinical Signs
1) Chicks
① The chief signs is respiratory symptoms.
② cough, runny nose and golgol sound.
③ as loss of appetite and feed intake is reduced and weight loss is a big obstacle to brooding.
④ Once the case of laying hens at a young age have genital infection caused irreparable and permanent developmental disabilities can also be non-laying hens.
 
2) Pullet
① cough from chickens more than 5-6 weeks of age and the symptoms that golgol sound the main symptoms.
② golgol breathing sounds can be heard when quiet at night.
 
3) Layer
① egg is sharply decreased by almost half of the hens normally it.
② a greater impact in the cases of old chicken infection than the new layer. After the molt egg production is also lowered than normal and it lays soft and deformitied eggs.

 
5. Prevention and Treatment
1)  Prevention
① control access, such as the outsiders or vehicle and refrain visit other poultry farms.
② poultry entrance if needed and always put your disinfection bucket shall be allowed entry of outsiders after wearing the shoes disinfected and sanitation wear.
③ the vaccine to be developed step by step and sanitary specification management.
④ Because this disease be vaccinated, even though the vaccine and should be vaccinated as well as a group dedicated to the prevention of pathogens from entering poultry in management.
⑤ seeks to prevent secondary bacterial infection.
 
 

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