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

Human anatomy-physiology , Human anatomy: Human anatomy is a branch of bio...

Human anatomy: Human anatomy is a branch of biology which, with deals with human physiology and biochemistry. It is mainly concerned with the scientific study of the internal stru

Define about the zinc deficiency, Define about the Zinc Deficiency? Evi...

Define about the Zinc Deficiency? Evidence suggests that nearly one-third of preschool children in lower-income countries have stunted growth, and that a considerable proportio

What are the main components of the cytoskeleton, The cytoskeleton is a net...

The cytoskeleton is a network of very little tubules and filaments spread throughout the cytoplasm of eukaryotic cells. It is made of microtubules, microfilaments and intermediate

Realization of p-d polarity of limb, Realization of P-D Polarity of Limb ...

Realization of P-D Polarity of Limb Realization of P-D polarity of limb expressed in a specified proximo-distal sequence of differentiation of limb pans is controlled through

Taxonomy, Write two cytological approaches in taxonomy.

Write two cytological approaches in taxonomy.

Define immediate preoperative period during surgery, Define Immediate Preop...

Define Immediate Preoperative Period during Surgery? Nothing should be given by mouth for at least 8 hours before a general surgery so that the stomach has no leftover food at

What are complementary genes, What are complementary genes? Does this inher...

What are complementary genes? Does this inheritance pattern obey Mendel's second law? Complementary genes are the different genes that act together to determine a given phenoty

Define classification of protein based on amino acid content, Explain Class...

Explain Classification of Protein based on amino acid content? Nutritionally, amino acids are classified on the basis of the body's ability to synthesize them - as essential (i

What are the difference between plasma membrane, Q. What are the difference...

Q. What are the difference between plasma membrane and cell wall? Plasma membrane and cell wall is not the same thing. Plasma membrane, also known as cell membrane, is the exte

Define the process of feeding 0-6 months infant, Define the Process of Feed...

Define the Process of Feeding 0-6 Months Infant? The term exclusive breast feeding is used when all fluids, energy and nutrients are provided by breast milk, with the possible

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