Learning objectives:

  • Describe the main diseases seen in commercial layer flocks in the UK/EU.
  • Compare and contrast the differences in diseases, disease prevalence and epidemiological factors between broiler chicken flocks and commercial layer flocks.
  • Compare and contrast the diseases seen in free range versus caged layer flocks.
  • Explain, using examples, how the structure of the commercial layer industry and the commercial broiler industry affects the susceptibility of the birds to different kinds of diseases (e.g. Mycoplasma).
  • Discuss the environmental persistence and control of the main parasites of commercial layer flocks.

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