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.
What are age pyramids? Age pyramids are graphical representations in form of superposed rectangles every representing the number of individuals contained in age ranges into whi
Oxygen Stratification - Lake Ecosystem In most lakes, oxygen stratification nearly parallels that of temperature during the summer season. The amount of oxygen is greatest on
Q. Dietary Management for short bowel syndrome? It must be evident from the symptoms listed above that the disease results in reduced food intake, impaired absorption and hence
Q. What functions regulates by hypothalamus? HYPOTHALAMUS - Main visceral control center of the body (yet small in size). Central to virtually all homeostatic control . Th
Which two of the following changes (a - d) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)? 1. Enhance in red blood cell size 2
What is cellulose? Cellulose is a long-chain polymeric polysaccharide carbohydrate, of beta-glucose. It creates the primary structural component of green plants. The primary ce
Explain circulatory support and types of shock? CIRCULATORY SUPPORT 1) A "shock" state is characterised by hypoperfusion of tissue and cellular hypoxia. Circulatory suppo
human skeleton
Q. What are the respective functions of the separation of homologous chromosomes and of the separation of alike chromatids in meiosis? The separation of homologous chromosomes
Define Conical Flask - Nutritional Biochemistry Conical flask is a piece of chemistry laboratory equipment, a container often made of glass, which has a narrow cylindrical mout
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