Duck plague (duck virus enteritis), Biology

Assignment Help:

Duck plague (duck virus enteritis)

Duck plague is the most serious disease caused by a herpes virus (Anatid herpes virus). Though antigenically homogenous, differences in virulence and some biochemical properties are observed among various isolates. The virus is relatively less stable and can be easily inactivated. Transmission is by direct and indirect contact mainly through water due to movement of infected birds. Transovarian transmission does not occur.

Symptoms and lesions: A sudden, high and persistent mortality in ducks of all ages

is an indication of duck plague. The birds may die in good condition. Nervous symptoms such as paralysis of the legs and wings, failure to swim in water, greenish diarrhea, lachrymation and depression are the clinical manifestations. In laying flocks the egg production is severely affected. The mortality rate varies from 10 to 90%. Breeder ducks show greater mortality than young birds.

PM lesions generally noticed are- the presence of blood in body cavities and

petechiae in various organs. The liver appears pale, copper coloured with petechiae and necrotic foci. Mucosal ulcerative eruptions in the gastro-intestinal tract and grayish white diphtheritic deposits in the mucosa of the esophagus are sometimes seen.

Diagnosis: The disease is diagnosed on the basis of the clinical signs, isolation and identification of the virus in CCL-141 cell line or duck embryo fibroblast and demonstration of viral antigens in the tissues by fluorescent antibody or ELISA tests.

Prevention and control: In India, vaccination with a modified live virus vaccine adapted in chicken embryo has been found to give good protection. This vaccine is usually administered subcutaneously to ducklings over 2 weeks of age.


Related Discussions:- Duck plague (duck virus enteritis)

Developmental disorders, DEVELOPMENTAL DISORDERS - 1 .      AMNIONITI...

DEVELOPMENTAL DISORDERS - 1 .      AMNIONITIS- Inflammation of amnion due to infection. 2 .      ABORTION- Escape of a embryo prior to the stage of viability (ab

When it is said that a bacteria is an obligate anaerobe, What is meant when...

What is meant when it is said that a bacteria is an obligate anaerobe? Obligate anaerobes are the living beings that do not survive in the presence of oxygen. For instance, the

Poverty and malnutrition, Poverty and Malnutrition Poverty and malnutr...

Poverty and Malnutrition Poverty and malnutrition are closely related. As noted before, many elementary aspects of being poor like hunger, inadequate health care, unhygienic l

Fluoride - mineral elements, FLUORIDE It is mostly available in drin...

FLUORIDE It is mostly available in drinking water. Fluoride is essential for the formation of enamel of the teeth. Deficiency of fluoride causes weakness of enamel.

Plant cell wall react when it is placed in hypotonic medium, How does the p...

How does the plant cell wall react when it is placed under hypotonic medium? Ans) The plant cell wall (the covering of the cell outside to the cell membrane) is made of cellulos

In unilocular ovary with a single ovule the placentation, In unilocular ova...

In unilocular ovary with a single ovule the placentation is : 1. Marginal 2. Basal 3. Free Central 4. Axile Basal

Foliose lichen stage - xerarch, Foliose Lichen Stage - Xerarch As ment...

Foliose Lichen Stage - Xerarch As mentioned earlier, the weathering of the rocks and the decaying of the crustose lichens results in the formation of soil on the otherwise bar

Can you explain myopia and hypermetropia, Q. How can the visual deficiencie...

Q. How can the visual deficiencies known as myopia and hypermetropia be optically explained? Myopia is the visual condition in which the images are formed previous to (in front

Problems with untreated/ammoniated crop residues, Problems with untreated/a...

Problems with untreated/ammoniated crop residues Besides the low energy and protein contents, crop residues generally contain low content of minerals such as Calcium, Phosphor

01.03 new technology, What is the best microscope to get a detailed view of...

What is the best microscope to get a detailed view of the parts inside of a preserved plant cell?

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