Poultry and duck diseases-avian leucosis complex (alc), Biology

Avian leucosis complex (ALC)


The disease in poultry is caused by an RNA virus classified under avian type C Retrovirus group under the family Retroviridae.


Epidemiology: Avian leucosis viruses are endemic in virtually all flocks of chickens. The clinical manifestation is sporadic in birds over 14 weeks of age with an incidence rate of around 3%. However, in some lines of birds the incidence rate may reach up to 20%.


Symptoms: The clinical sings in affected birds show pale comb, shriveled, cyanotic and enlarged abdomen. On autopsy, tumors occur in liver, spleen, bursa and in a few other internal organs. Microscopically the lesions reveal multicentric aggregates of lymphoblasts.


Diagnosis:
ALC is diagnosed by complement fixation test (CFT), radioimmunoassay (RIA) and ELISA for group specific antigens. Tests for reverse transcriptase, immunohistochemical tests; virus isolation methods etc. are available for laboratory confirmation of the disease. There is no effective vaccine available to control this disease.
Treatment and control: It is controlled through

(i) establishing leucosis - free breeding flocks by a routine screening and breeding programme

(ii) strict hygienic conditions on the premises to ward off lateral transmission of the virus

(iii) encouraging breeds derived from ALC- resistant flocks.

Posted Date: 9/18/2012 9:26:47 AM | Location : United States







Related Discussions:- Poultry and duck diseases-avian leucosis complex (alc), Assignment Help, Ask Question on Poultry and duck diseases-avian leucosis complex (alc), Get Answer, Expert's Help, Poultry and duck diseases-avian leucosis complex (alc) Discussions

Write discussion on Poultry and duck diseases-avian leucosis complex (alc)
Your posts are moderated
Related Questions
Q. Flavour of food product? Flavour factors include both sensations perceived by the tongue, which include sweet, salty, sour and bitter tastes and aromas perceived by the tong

Creb binding protein (CBP) is a histone acetyl transferase (HAT) protein. What role does the  addition of acetyl groups to histones play during development? A. The addition of

Planning of Nursing Care     Administer the drugs as prescribed -    Prevent infection    Control bleeding  Implementation of Nursing Care   Administer th

To get the idea on the process capability that whether the intended process provides the consistent results or not(precision).

Explain about the Radiation Therapy? Radiation therapy is one of the options for the treatment of various tumors. During the administration of radiation patients experience acu

#question. what is cloning.

Explain about the Spinal Trauma? Spinal trauma or spinal cord injury, commonly clue to accidents, fills, sports injury can result in serious disabling consequences. The spinal

Q. What do you mean by Canning? Canning The term canning is generally applied to foods, more specifically, to the foods preserved by heat processing. It aimgto destroy microo

Q. How the DNA nanoarchitecturing works? DNA Nano architectures constructs that can be self-assembled from branched DNA molecules. Their components can be simple branched speci

What is Community Ecology explain their characterstics? Community Ecology: In ecological terms, a community consists of an assemblage of all of the populations living and int