Scrapie, Biology

Assignment Help:

Scrapie

This is a chronic fatal disease of sheep and occasionally of goats caused by a Prion agent similar to BSE. The disease is reported from Europe, North America and in a few countries of Africa and Asia.

Clinical signs: Incubation period is of 2-5 years. Affected sheep show excitement, signs of muscular tremors of head and neck, wavering gait, vacant look and paraplegia. Sheep develop pruritus with wool loss and skin rubbed raw. They loose weight and ultimately die.

Diagnosis: The disease is diagnosed by the clinical signs, direct electron microscopy of brain material or demonstration of Prion protein by Western blot. The agent can be transmitted to mice and hamster and these species are being used as laboratory models for characterizing the agent.


Prevention and control:
The disease is controlled by systematic detection of infected  and in-contact animals and their disposal by slaughter and consequently building disease free "certified flocks".


Related Discussions:- Scrapie

Fate map - gastrulation in chick, Fate Map - Gastrulation in Chick All...

Fate Map - Gastrulation in Chick All the three main germinal layers (ectoderm, mesoderm, endoderm) are made from cells initially located in the epiblast in area pellucida, hen

External events contribute to gain of heat in the body, What (a) internal, ...

What (a) internal, (b) external events contribute to gain of heat in the body?   a) Respiration in the tissues, particularly in the brain and active muscles, is the major in

Phylum colentrata, In phylum colenterata if tissues are present in the body...

In phylum colenterata if tissues are present in the body of an organism then why organs are not present as group of tissues makes an organuestion..

Capital reserves, Capital Reserves 1. This is raised with selling shar...

Capital Reserves 1. This is raised with selling shares at a premium. As the difference among the market price less floatation costs and par value is credited to the capital re

Explain the characterstics of acute ar murmur, Explain the characterstics o...

Explain the characterstics of Acute AR Murmur ? Characteristic: Relatively low pitched, decrescendo diastolic murmur, which may end part way through diastole. These murmurs ar

Analysis of developmental potency of nuclei, Analysis of Developmental Pote...

Analysis of Developmental Potency of Nuclei The instances given above and many other observations and experimental results of this nature provide tough support to the hypothes

Wigs and hairs - seed appendages, Wigs and hairs - Seed Appendages Se...

Wigs and hairs - Seed Appendages Seeds of certain plants have epidermal outgrowths or the integuments themselves may form folds and projections that present a wing-like appea

.excretion, name the blood vessel which bring waste product to kidney

name the blood vessel which bring waste product to kidney

Carbon cycle, state 3 ways human activities add carbon to the atmosphere

state 3 ways human activities add carbon to the atmosphere

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