Duck virus hepatitis, Biology

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.

Posted Date: 9/18/2012 8:46:19 AM | Location : United States







Related Discussions:- Duck virus hepatitis, Assignment Help, Ask Question on Duck virus hepatitis, Get Answer, Expert's Help, Duck virus hepatitis Discussions

Write discussion on Duck virus hepatitis
Your posts are moderated
Related Questions
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Tantalum and Niobium in alloplastic implant materials  Tantalum has been used successfully in needle type, screw- type and double-bladed implants. However, both are difficult

As we have seen, in during epinephrine hormonal control or glucagon, dephosphorylated   phosphorylase   kinase   is activated by being phosphorylated by protein kinase. This then a

An element playing significant role in nitrogen fixation is : 1.  Molybdenum 2. Copper 3. Manganese 4. Zinc An element playing significant role in nitrogen fixation

These labs discuss the principle of osmolarity, which is defined as the total number of solute particles in 1 L of solution. Is this the same thing as tonicity? Explain your answer

C h r on i c respiratory disease (CRD) Infection with Mycoplasma gallisepticum is characterized by slow onset; CRD is seen in chickens, turkeys, and other birds. Ducks f

Explain the Shear or Moment Diagrams Shear diagram changes by magnitude of the load. Shear is constant along unloaded portions of a beam For a point load, the she

What is Fontan Operation and Modifications ? Earlier reported to have 20 per cent mortality, it has come down to five per cent in specialized centres. In the earlier series th

Accidents and Losses Accident can be considered as an incident occurring without intention and results in injury, loss of body part or even death of a human being or a few per

Describe about the Primary Prevention - Food Allergy? Let us further, dwell on measures we could adopt in primary, secondary and tertiary prevention. Current research in primar