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!
Duck virus hepatitis
This highly contagious disease of ducks is caused by a member virus belonging to genus Enterovirus of the family Picornaviridae. It mostly affects ducklings below 3 weeks of age and is reported from coastal and duck rearing pockets of India. The disease is transmitted by ingestion of infected material. The vaccinated, clinically affected and recovered birds excrete the virus in large amounts in their feces for months.
Symptoms and lesions: With short incubation period of less than 24 h the clinical manifestations like depression, greenish diarrhoea are seen. Mortality may be up to
90% in ducklings below 7 days of age but in endemic areas, it may be as low as 10%.
Affected ducklings show enlarged and mottled liver showing hemorrhages, necrosis and cellular infiltration.
Diagnosis: The disease can be diagnosed on the basis of sudden onset and high
mortality in ducklings below 3 weeks with characteristic liver lesions. Virus isolation can be attempted from the liver, feces and whole blood by inoculating into embryonated eggs. About 60% of the infected embryos die within 5 days showing edema, stunted growth and greenish discoloration of the embryo fluid. The processed materials can be inoculated into susceptible day old ducklings. In positive cases the ducklings will die within 36 h after showing symptoms and lesions mentioned above. The confirmation is done by virus neutralization and detection of viral antigens in the liver, spleen by fluorescent antibody test.
Prevention and control: Introduction of new ducklings should be done with prior testing and general biosecurity measures. In endemic areas day-old ducklings can be vaccinated with egg-adapted live virus vaccine.
SMAL L INTESTINE - A narrow tube 6 m long. In rabbit 4 m. long.Differentiated into duodenum, jejunum & Ileum. (i) Duodenum - 2.5 cm long. C-shaped (U-shaped in rabbit)
Define Sample Titration for Estimation of Vitamin c in Lemon Juice? Cut the lemon into two halves with a stainless steel knife. Remove the seeds. Squeeze the juice from half a
Photosynthesis Two main energy pathways are recognised in living systems. These are photosynthesis and cellular respiration. Both have their respective but different electron
The following histograms were produced using flow cytometry after labelling B-cell lymphocytes with propidium iodide. Histogram A is from a healthy individual while Histogram B is
Determine the reliability of the battery The issue of reliability of the battery has been addressed, with reasonably successful results. Clinical interpretation of the battery
The Halstead Tactual Performance Test This procedure used a version of the Seguin-Goddard Form board, but it is done blindfold. The subject's task is to place all the 10 blocks
why is it necessary to grind food before the testng?
Morphogenesis of an Ectodermal Derivative During the development of vertebrate body the dissimilar regions in the three germ layers of the gastrula become segregated from each
Determine in brief about the MSE The MSE deals with questions concerning the addressee's Consciousness, Emotional State, Thought Content and Clarity, Memory, Sensory Perception
Define the Enzyme Function of Vitamin C? Vitamin C acts as an electron donor for 11 enzymes. Three of those enzymes are found in fungi but not in humans. Of the eight remainin
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