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

Anticoagulation, In patients with left ventricular failure and reduced ejec...

In patients with left ventricular failure and reduced ejection fractions, the risk of LV thrombus formation and systemic arterial embolization appears to be primarily in patients

What are the functions of the spleen, What are the functions of the spleen?...

What are the functions of the spleen? Why is a total splenectomy (surgical removal of the spleen) compatible with life? The spleen has many functions: it participates in the de

What is the importance of surface area, A. How is the villus the functional...

A. How is the villus the functional unit of the small intestine? In your answer, include a discussion of its structure and function and the enzymes found there. What is the importa

What would the priorities be for allocating, Agriculture, industry, and gro...

Agriculture, industry, and growing populations of cities all compete, through political influence, for water. If you were in charge of water resources in an arid region, what would

What is cyanosis, What is Cyanosis ? Cyanosis: Cyanosis may be peripher...

What is Cyanosis ? Cyanosis: Cyanosis may be peripheral or central. Peripheral cyanosis almost exclusively involves lips and extremities. Normal neonates may have bluish extrem

Difference between dominant epistasis and recessive epistasi, What is epist...

What is epistasis? What is the difference between dominant epistasis and recessive epistasis? The Epistasis is the gene interaction in which a gene (the epistatic gene) able to

Reciprocal crosses , RECIPROCAL CROSSES Similar results were obtained w...

RECIPROCAL CROSSES Similar results were obtained with reciprocal crosses also. A reciprocal crosses involves the same traits but carried by sexes opposite to those in the origi

The principle of dna cloning, Assume an experimental target that is to make...

Assume an experimental target that is to make vast amounts of a particular DNA fragment in pure form from a combination of DNA fragments.  Whereas the DNA fragments can be introduc

Explain adverse effects of interferon alfa, Adverse Effects Of interferon a...

Adverse Effects Of interferon alfa Intramuscular or subcutaneous injection of interferon is commonly associated with an influenza-like syndrome, especially during the first wee

Brookes formula, Brooke's  Formula: a)  Fluid  requirement  b)  Es...

Brooke's  Formula: a)  Fluid  requirement  b)  Estimate the accurate/approximate weight of the patient  c)  First  24  hours  Colloids (blood, plasma, dextran) 0.5 ml

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