Duck virus hepatitis, Biology

Assignment Help:

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.


Related Discussions:- Duck virus hepatitis

Define cooking, Define cooking,blanching and Canning - thermal processing? ...

Define cooking,blanching and Canning - thermal processing? Cooking: Cooking is a primary process to make food more palatable and improve taste. This is not used as a preservati

Extension cord causing injury, A 19 year old model for Glamour magazine tri...

A 19 year old model for Glamour magazine tripped over an extension cord causing injury to her epidermis. She is afraid the injury will leave a scar. Based on your knowledge of rege

What are the factors affecting taste quality, Q. What are the factors Affec...

Q. What are the factors Affecting Taste Quality? You may have experienced that the four primary tastes i.e., sweet, sour, salty and bitter are not sensed with an equal ease. Th

Define partition chromatography - basic separation technique, Define Partit...

Define Partition chromatography - basic separation technique? It is a technique in which separation is achieved as a consequence of the relative solubility of a substance in th

Define the energy cost of growth, Define the Energy Cost of Growth? The...

Define the Energy Cost of Growth? The energy cost of growth has two components: 1) The energy needed to synthesize growing tissues; and 2) The energy deposited in these tis

Explain spray-dried milk powder, Q. Explain Spray-dried milk powder? Th...

Q. Explain Spray-dried milk powder? The milk which is concentrated by the process of spray drying contains about 40- 45% total solids. Do you know how the dried milk powder i

Liquid fuels, Petroleum Liquid fuels are widely used for industrial and...

Petroleum Liquid fuels are widely used for industrial and domestic purposes. Almost all internal combustion engines run on liquid fuels. Liquid fuels are also used in heat gene

BIOLOGY , HOW CAN YOU JUSTIFY NEWTON THIRD LAW OF MOTION IN A TYPICAL PLANT...

HOW CAN YOU JUSTIFY NEWTON THIRD LAW OF MOTION IN A TYPICAL PLANT CELL?

Skeletal system - cerebro-spinal fluid, Cerebro-spinal Fluid - Formed m...

Cerebro-spinal Fluid - Formed mainly by choroid plexus and ependyma of ventricles. It comes out of medulla oblongeta by foramen of magandie and lushka . Slightly alkalin

What is fermentation, What is fermentation? Name any two organic compounds ...

What is fermentation? Name any two organic compounds formed in this process

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd