Happenings / Clinical Signs
- Egg production declines rapidly
- Mature birds may experience a temporary drop in egg production (5-10%) but do not develop neurologic signs
Avian Encephalomyelitis in laying hens experiences a temporary drop in egg production about 5-10% and last for 5-14 days, with return to full potential production at the end of this period. There is no loss of egg shell quality.
- Causing Agents
- Viral disease. Virus (Picornaviriade family). It has been tentatively placed in the genus Hepatovirus. (Year 2000).
- Affected Systems/Organs
- Reproductive System
- Via the oral infection route. Contaminated feaces, environment, feed, water and equipment
- Mainly Affects
- Egg production
- Vaccination Programs, Good Hygiene and Biosecurity practices.
- Suggested Actions
- Can be confirmed with clinical signs and gross lesions
- Can be managed with vaccination programs
- Diagnosis should be confirmed with rapid assays and/or a certified laboratory
- Veterinary intervention is recommended
Impact on Egg quality
Impact on Liveability
Impact on Production
Overall Economic Impact
Y.M. Saif.2008.Disease of Poultry. 12th Edition. page 433
Mark Pattison, Paul F. McMullin, Janet M. Bradbury. Dennis J. Alexander. 2008. Poultry Diseases. 6th Edition.
Paul McMullin. 2004. A pocket Guide to Poultry Health and Disease. First Edition.
Steven Leeson, John D. Summers. 2008. Commercial Poultry Nutrition. Third Edition.
Donald D. Bell, Williams D. Weaver. 2009. Commercial Chicken Meat and Egg Production. Fifth Edition.