Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Egg drop syndrome-76 (EDS-76)
An outbreak of sudden drop in egg production or a failure to achieve a normal peak in production despite optimum managemental and nutrition status is attributed to a viral disease called as EDS-76. The cause was identified as adenovirus, first isolated in Northern Ireland in 1976. Mortality is usually negligible. Circumstantial evidence suggests that the main route of transmission is through the eggs (vertical transmission) followed by latent infection during growing stage with viral excretion starting shortly before sexual maturity. Contamination of egg trays at packing stations and biting insects may play a part in transmission. The virus is commonly present in ducks and geese but does not cause the disease. Lateral transmission from bird to bird is slow.
Symptoms and lesions: The disease occurs during sexual maturity. Birds do not show clinical signs of the disease except drop in egg production at peak or failure to peak. Drops may be up to 50% and for 3-4 weeks duration. Rough, thin or soft-shelled eggs and shell-less eggs, loss of shell pigment, poor internal quality are the other indications.
Diagnosis: Diagnosis is made from the characteristic clinical feature of rapid drop in egg production during the peak production in broiler parents, the characteristic shape of the eggs laid and the virus isolation from the cloacal swabs. EDS-76 virus can agglutinate red cells of chicken, duck, turkeys, geese and pigeons but not mammalian cells. The virus can be propagated in 9 day embryonated duck eggs by the allantoic route in which it produces very high titre. The antibody in affected flock can be detected either by hemagglutination inhibition, virus neutralization or ELISA tests.
Prevention and control: Vertical transmission can be avoided by selection of birds from uninfected flocks and good hygiene and management. Proper disposal of infected eggs should be made as they are the most important source of the virus. Vaccination with an oil adjuvant inactivated vaccine is reported to give good protection when given at 14 to 16 weeks of age.
Q. Explain Uristix Benedicts test? No sugar/glucose is excreted in the urine in normal individuals. In diabetics, glucose is excreted by the kidneys when the blood sugar levels
Q. What is Subxiphoid Short Axis Sweep? To obtain the subxiphoid short axis view transducer should be rotated by 90 degree clockwise, fi-om the previous position so that p
Explain Blood Vessels that carry blood? Blood vessels that carry blood away from the heart to the lungs or to the rest of the body are called arteries. The walls of arteries ha
Crustaceans - Hormones in Growth and Reproduction Arthropods have a tough and frequently hard exoskeleton made up of cuticle composed of chitin and protein. The cuticle impose
Initial Maintenance Steps of implants It is very essential, that from the beginning of the patient interaction regarding the implant therapy, through the diagnosis and planning
how to write a assignment on autoradiography
What does Liquescence digestive enzyme do? It helps to normalize the secretion of digestive juices and enzymes in the gastrointestinal tract
How important is biology to Accountancy>
M a g n etic resonance imaging (MRI): It is in use as a clinical diagnostic tool since 1980. The distribution of hydrogen nuclei (protons), present in cellular wa
What is the indolacetic acid (IAA)? IAA or Indolacetic acid (indolyl-3-acetic acid) is the major natural auxin made by plants. It promotes plant growth and cellular differentia
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd