Maedi/visna, Biology

Assignment Help:

Maedi/visna

Maedi, a progressive pneumonia, and visna, a neurotropic disease, found in sheep and goats are caused by the Maedi/visna virus, belonging to the family Retroviridae. It is a zoonotic disease. The disease has not been reported from India.Epidemiology: The transmission of disease takes place through inhalation, drinking contaminated water and colostrum by young ones. The intrauterine transmission of  the virus has also been observed.

Clinical signs: Incubation period of over 2 years and has protracted clinical course lasting 6 months to several years.Maedi (progressive pneumonia): Progressive weight loss and dyspnoea, initially detected after exercise, and becomes more apparent over time. Affected sheep straggles, head jerking with inspiration and nostrils are flared. There may be nasal discharge and cough.


Visna: Weakness of the hindleg and stumbling. Progressive weight loss and trembling of facial muscels and limbs is seen leading to paraplegia.
Diagnosis: The disease is diagnosed histopathology. Enzyme immunoassay, agar gel diffusion and syncytial plaque reduction assays are used for detection of antibodies. Western blotting is used for confirmation of the disease. Viral DNA is detected in cells by in situ hybridization or viral RNA amplification by RT-PCR.


Prevention and control: Slaughtering of sero-positive sheep is one of the approaches suggested for containing the infection. Dipping of sheep with acaricides and spraying in environment controls ticks.


Related Discussions:- Maedi/visna

What is lipoproteins, A lipoprotein is a biochemical assembly which haves b...

A lipoprotein is a biochemical assembly which haves both lipids and proteins, bound to the proteins that allow fats to move by the water outside and inside cells. The proteins serv

Determine the fransworth 100 hue panel test, Determine the Fransworth 100 H...

Determine the Fransworth 100 Hue Panel Test This is a simple and useful test using colour chips arranged in a particular sequence. Colour deficient patients make errors in arra

Facilitation model - models of succession, Facilitation Model - Models of S...

Facilitation Model - Models of Succession This is considered as the classical model of succession. It is based on the assumption that species of a previous stage are replaced

What is phospholipids, What is Phospholipids ? Phospholipids :  Ph...

What is Phospholipids ? Phospholipids :  Phospholipids are similar to triglycerides, except that they contain only two fatty acid, and one or both of the fatty acids have

Radiography, R a d i o g r a p h y: ...

R a d i o g r a p h y: Radiograph or X-ray remains the most well-known and primary diagnostic tool of all the imaging modalities. It works b

Reproductive systems, compare the lengths and paths of the uterine tubes (o...

compare the lengths and paths of the uterine tubes (oviducts) of the cat and the human

Explain the ethological approach in taxonomy, Explain the Ethological Appro...

Explain the Ethological Approach in Taxonomy The use of behavioural or ethoIogica1 characteristics in animals is relatively new, though extremely useful, particularly in the id

Calculate ideal weight for a diabetic patient, Q. Calculate ideal weight fo...

Q. Calculate ideal weight for a diabetic patient? We now know that diabetes is the outcome of many genetic and environmental factors. The former is not in our control but the l

Explain lipid formulations, Explain Lipid Formulations Three lipid form...

Explain Lipid Formulations Three lipid formulations of amphotericin B are marketed in the US: amphotericin B lipid complex (ABLC, Abelcet), liposomal amphotericin B (L-AmB, AmB

Cell theory, why is cosmozoic theory considered to be true?

why is cosmozoic theory considered to be true?

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