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Infectious Bronchitis (Differential Diagnosis (Newcastle Disease(ND),…

- - - - Replicate and produces lesion in epithelial cells
        respiratory tract (nasal turbinates, Harderian gland, trachea, lungs and air sacs), kidneys, gonads (testes, oviduct)
        
        Damage the respiratory epithelium
        
        Secondary Bacterial Infection
        
        Airsacculitis
        
        Renal failure
        
        Drop in egg production
        
        Cystic Oviduct
      - Grows in many cells of alimentary tract (oesophagus, proventriculus, duodenum, jejunum, bursa of Fabricus, cecal tonsils, rectum and cloaca
        
        Secondary Bacterial Infection
        
        Systemic colibacillosis
- - - - Not serotype specific
      - Detect a recent infection
  - - - inoculated embryonated eggs
      - tracheal organ cultures
      - tracheal samples
  - - - Typical lessions (5-7 post inoculation)
        
        Dwarfing of embryo
        
        Possibly white urate deposits in kidneys
        
        Curling
    - - 2-3 days post inoculation
        
        Ciliostasis
        
        Damage to the tracheal epitheli
- - - - strict isolation of day-old-chicks because post infection bird will continue to excrete
      - clean and disinfect poultry houses
    - - Live
        
        Used in boilers and for initial vaccination of breeders.
        Usually used in combination with NDV and IBD
        
        Route : eyedrop, intra-tracheal, intra-nasal, drinking water and aerosol spray
      - Inactivated
        
        Used at point of lay in breeders and layers
        
        Route : injection at subcutaneous layer
      - Classic & Variant type of vaccine is available in the market
- - - - Massachusetts / Connecticut
        
        Worldwide!!
    - - 793/B
      - QX-like (IBS130/2015)
        
        Malaysia
      - (IBS037A/2014)