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!
Duck virus hepatitis
This highly contagious disease of ducks is caused by a member virus belonging to genus Enterovirus of the family Picornaviridae. It mostly affects ducklings below 3 weeks of age and is reported from coastal and duck rearing pockets of India. The disease is transmitted by ingestion of infected material. The vaccinated, clinically affected and recovered birds excrete the virus in large amounts in their feces for months.
Symptoms and lesions: With short incubation period of less than 24 h the clinical manifestations like depression, greenish diarrhoea are seen. Mortality may be up to
90% in ducklings below 7 days of age but in endemic areas, it may be as low as 10%.
Affected ducklings show enlarged and mottled liver showing hemorrhages, necrosis and cellular infiltration.
Diagnosis: The disease can be diagnosed on the basis of sudden onset and high
mortality in ducklings below 3 weeks with characteristic liver lesions. Virus isolation can be attempted from the liver, feces and whole blood by inoculating into embryonated eggs. About 60% of the infected embryos die within 5 days showing edema, stunted growth and greenish discoloration of the embryo fluid. The processed materials can be inoculated into susceptible day old ducklings. In positive cases the ducklings will die within 36 h after showing symptoms and lesions mentioned above. The confirmation is done by virus neutralization and detection of viral antigens in the liver, spleen by fluorescent antibody test.
Prevention and control: Introduction of new ducklings should be done with prior testing and general biosecurity measures. In endemic areas day-old ducklings can be vaccinated with egg-adapted live virus vaccine.
Explain Administrative dietitian Administrative dietitian play a major role in large-scale meal planning and monitoring the food preparation process by applying the
Define Iron - The Micronutrient Iron, as you may be aware, is a trace element present in the body. The body contains approximately 3 - 3.5 g of iron of which about two thirds i
DIGESTIVE SYSTEM OF MAMMALS The tube from mouth up to anus is called alimentary canal. Alimentary canal of man is about 9 meter and rabbit is about 6 meter. Digestive
which was the first harmone discovered#
What capacity does the brain have to repair itself after injury or disease? It has long been accepted dogma that central nervous system doesn't regenerate itself after traumati
Explain Procedure for Analysis of Air of Processing Facility? Now conduct the experiment following the steps enumerated herewith: 1. Label the Petri plates with nutrient aga
Define effect on Human placental lactogen in pregnancy? Human placental lactogen, with a structure similar to the growth hormone, increases throughout pregnancy. Its rate of pr
In a properly functioning negative feedback system A. value of the controlled variable will always be very close to the threshold value when the system is in steady state.
EPITHELIA L TISSUE OR EPITHELIA Epithelium term coined by Ruysh, it was applied originally to thin skin covering the nipple. (G.epi = upon, thele = nipple) Epithelial tis
Glycogen Storage Diseases Glycogen storage diseases are caused by genetic defects that result in deficiencies in certain enzymes of glycogen metabolism. These deficiencie
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