Newcastle Disease Newcastle disease is highly contagious viral disease of chickens, turkeys, and most other birds. The most severe form of the disease is characterized in chickens by high mortality, nervous signs and haemorrhagic and necrotic lesions in the gut mucosa. The severity of the symptoms depends on the virulence of the infecting virus and…
Gumboro Disease Infectious bursal disease, or Gumboro disease (IBD), is seen in young domestic chickens worldwide and is caused by infectious bursal disease virus (IBDV). The target organ for the virus is the Bursa of Fabricius where the virus replicates in the B lymphocytes, thereby destroying them. The degree of destruction can vary depending on…
Infectious Bronchitis Infectious bronchitis is an acute, highly contagious upper respiratory tract disease in chickens. In addition to respiratory signs, decreased egg production and egg quality are common, and nephritis can be caused by some strains. Attenuated live and killed vaccines are available, but different antigenic types of the avian coronavirus causing the disease do…
