Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Viral Diseases
Avian encephalomyelitis
This is enterovirus disease of chicken, pheasants, turkeys and Japanese quails caused by the member of the family Picornaviridae. It causes inapparent infection or drops in egg production in adult layer birds, whereas in young chicks, it is responsible for epidemic tremors. There are 15 serotypes of the virus which are enterotopic in nature which differ in their neurotropism and virulence. The morbidity and mortality varies depending on the immune status of the birds. The disease is transmitted vertically through infected eggs or horizontally by ingestion of contaminated food and water. The virus is resistant to environmental conditions particularly if protected by organic matter.
Symptoms and lesions: In layers, the drop in egg production is very low (5-10%) and of short duration (less than 2 weeks). In breeders there may be a drop in hatchability of about 5%, but there is serious disease in the progeny involving central nervous system. The clinical signs include dullness, ataxia and tremors of the head and neck followed by paralysis, prostration and death. The mortality may reach upto 25%. Unilateral or bilateral blindness or corneal opacity may also be seen. There may not be any gross lesions seen during PM examination. In central nervous system, the inflammatory lesions are noticed in brain and ganglions however, peripheral nerves are not affected.
Diagnosis: Clinical symptoms and histopathological lesions, virus isolation and identification and detection of viral antigen in brain by fluorescent antibody technique confirm the diagnosis.
Prevention and control: Hatchery biosecurity and general hygienic measures should be followed.
Q. Symptoms of ulcerative colitis? As discussed in the case study above, the common symptoms are: 1. Mild abdominaI discomfort, an urgent need to defecate several times a da
Q. Explain about Mandible? In the mandible, attached keratinized tissue normally atrophies with the underlying bone. As a result there is generally a relatively narrow band of
what are the general methods for studying microbial physiology
Conventional CABG on Cardiopulmonary Bypass Chest is opened by midline incision and median sternotomy. Simultaneously saphenous vein or radial artery is harvested. 'T
Nutrients and the Soil Early experiments on mineral uptake were performed by Hoagland, Stout and Amon in 1923. They showed that minerals were taken up from the soil primarily
Maturation Phase The Maturation phase characterizes he transformation of diploid primary spermatocytes into haploid spermatids. The primary spermatocyte divides meiotically t
The nucleolus is a small and optically dense region in the interior of the cell nucleus. It is made of ribosomic RNA (rRNA) and proteins. Single nucleus can have one or more nucleo
Q. Dietary Management of Children with Diarrhoea? Diarrhoeas are more common in children and malnutrition often leads to the elicitation of this symptom as undernourished are m
Nature and Structure of Community Every place on earth -grasslands, forests, and ponds, edge of the river or sea is shared by many coexisting organisms. Plants, animals and mi
Compare the modes of intercellular communication used by the endocrine and nervous systems and discuss the functional significance of the differences between the two systems.
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd