# Commission Decision of 4 August 2006 approving a Diagnostic Manual for avian influenza as provided for in Council Directive 2005/94/EC (notified under document number C(2006) 3477) (Text with EEA relevance) (2006/437/EC), Division 6: Clinical signs in captive birds

Extent: E+W+S+N.I.

The spectrum of clinical signs can be very broad and, as with poultry, can range from inapparent to severe signs of the disease resulting in high mortality.
Generally, infection spreads more slowly in a collection of captive birds due to the variety of different species kept, with different susceptibilities, inconsistent levels of virus shedding and often relatively slow transmission due to a low contact rate and relatively low stocking densities.

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Source: https://www.legislation.gov.uk/eudn/2006/437/annex/chapter/II/division/6 (the official version)
Page: https://openlegislation.uk/eu-decision-2006-437/annex/chapter-II/division-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.