: Enfeksiyöz bronşitis (IB), kanatlı hayvan endüstrisindeki özellikle genç ve yetişkin yumurtacı broyler tavukların, solunum ürogenital sistemlerinde lezyonlara yol açan bu nedenle karkas gelişimi yumurta kalitesinde düşmeye neden olan prevalansı yüksek önemli ekonomik kayıplardan sorumlu akut, derecede bulaşıcı viral bir enfeksiyondur. Bronşitis ilk kez 1930 yılında Amerika Birleşik Devletleri...

Infectious bronchitis virus (IBV) is ubiquitous in most parts of the world where poultry are reared and is able to spread very rapidly in nonprotected birds. It is shed via both the respiratory tract and the faeces and can persist in the birds and faeces for several weeks or months. Although strict biosecurity and working with a one-age system are essential control measures, normally vaccinatio...

A comparison of 17 infectious bronchitis virus strains, using the same test procedure and assay system, demonstrated that stability at an acid pH is a variable characteristic of the avian coronaviruses.

Two distinct types of avian infectious bronchitis virus (IBV) particles were isolated on sucrose density gradients. The higher density particles banded at 1.18 g/ml, had typical coronavirus morphology and contained all the structural polypeptides and a complete genome. The less dense particles of density 1.13 g/ml appeared to have typical coronavirus morphology, although they were much more fla...