Changes

==Signalment==

==Signalment==

The disease affects '''chickens''' but can also affect quail. Poultry that have previously been exposed to CAV and have CAV antibodies develop immunity.  Disease is more '''severe in chicks'''

The disease affects '''chickens''' but can also affect quail. Poultry that have previously been exposed to CAV and have CAV antibodies develop immunity.  '''Disease is more severe in chicks'''

==Clinical Signs==

==Clinical Signs==

==Epidemiology==

==Epidemiology==

Fomites may assist the transmission of the virus and the disease  can be spread both '''horizontally''' and '''vertically''', resulting in '''clinical''' and '''subclinical infections''', respectively and the latter being of particular importance to intensive breeding populations. The '''age''' of the bird has a marked effect on the '''development of clinical signs'''.'''Chicks hatching''' from infected layers of naive flocks (vertical transmission)'''show clinical signs after 10-14 days of age''' over a '''period of 3 to 6 weeks'''. After which the breeder layers develop sufficient CAV antibodies to stop the transmission of the virus to the egg. '''Mortality peaks''' during the '''third week of life''' around 5 to 10% but can be as high as 60%.  Whereas '''older chicks''' greater than 14 days old that become infected with CAV '''do not exhibit clinical signs'''.

Fomites may assist the transmission of the virus and the disease  can be spread both '''horizontally''' and '''vertically''', resulting in '''clinical''' and '''subclinical infections''', respectively and the latter being of particular importance to intensive breeding populations. The '''age''' of the bird has a marked effect on the '''development of clinical signs'''.'''Chicks hatching''' from infected layers of naive flocks (vertical transmission) '''show clinical signs after 10-14 days of age''' over a '''period of 3 to 6 weeks'''. After which the breeder layers develop sufficient CAV antibodies to stop the transmission of the virus to the egg. '''Mortality peaks''' during the '''third week of life''' around 5 to 10% but can be as high as 60%.  Whereas '''older chicks''' (>14 days old) that become infected with CAV '''do not exhibit clinical signs'''.

    

    

==Distribution==

==Distribution==