Page 49 - Primary Five Science

Black Head

It is caused by Protozoa. It affects the liver and the caecum.

Signs and symptoms of blackhead

 Sulphur coloured diarrhoea.

 Dark purple head.

 Loss of appetite

 Darkening of the skin and wattle.

 Yellow green circular wounds (lesions)

Prevention and control of Blackhead

 Avoid overcrowding.

 Separate sick birds from other chicken