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

What are some factors that can lead to protein denaturizing, Protein denatu...

Protein denaturizing can be source by temperature variation, pH change, and changes in the concentration of surrounding solutes and by other processes. Most proteins are denatured

Oogenesis., write breif notes on oogenesis

write breif notes on oogenesis

A fruit fly has four pairs of chromosomes in its cells, A fruit fly has fou...

A fruit fly has four pairs of chromosomes in its cells. At meiosis, how many dissimilar combinations of maternal and paternal chromosomes are possible in the gametes? In gamet

Explain vasopressindrug term, Explain Vasopressindrug term? As a single...

Explain Vasopressindrug term? As a single bolus of 40 U, vasopressin has been recommended as an alternative to epinephrine in VF/pulseless VT refractory to defibrillation. Furt

Omega-3 essential fatty acids, Q. Omega-3 Essential Fatty Acids? Omega-...

Q. Omega-3 Essential Fatty Acids? Omega-3 essential fatty acids found in flax and cold-water fish help fight inflammation. For a condition such as diverticulitis, it may be wis

Signaling molecules with intracellular receptors, Little  lipophilic  (lipi...

Little  lipophilic  (lipid-soluble)  hormones  distribute  across  the plasma  membrane and  then  interact  with  intracellular  receptors  in  the  nucleus/cytosol.  The receptor

What is the elimination of the sliding clamp, Which of the following result...

Which of the following results from the elimination of the sliding clamp? A. DNA polymerase will no longer be processive and will fall off the double helix after synthesizing

Illustrate about the metabolic waste products in the cornea, Illustrate abo...

Illustrate about the metabolic waste products in the cornea? Metabolic Waste Products During the metabolism various waste products including lactic acid, protein an

Skeletal system - arm bones, ARM BONES - Each arm contain 30 bones as ...

ARM BONES - Each arm contain 30 bones as : humerus in upper arm, radius ulna in forearm, 8 carples in wrist, 5 metacorples  in plam, 14 phalnges in fingers. HUMERU

Define tests to measure muscular strength and endurance, Define Tests to Me...

Define Tests to Measure Muscular Strength and Endurance? It is important to first understand the difference between muscular strength and endurance. To know the muscular streng

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