Difference between revisions of "Avian Encephalomyelitis Flashcards"
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*Horizontally via faecal-oral route (main route of infection) | *Horizontally via faecal-oral route (main route of infection) | ||
*Vertical transmission from infected layer to their chicks | *Vertical transmission from infected layer to their chicks | ||
| − | *The virus replicates in the epithial cells of the alimentary tract and is circulated in the bloodstream to other organs and the central nervous system (CNS). The virus is shed within 3 days of oral ingestion and in young chicks can continue to be shed for over two weeks. Shedding ceases once specific | + | *The virus replicates in the epithial cells of the alimentary tract and is circulated in the bloodstream to other organs and the central nervous system (CNS). The virus is shed within 3 days of oral ingestion and in young chicks can continue to be shed for over two weeks. Shedding ceases once specific antibodies are produced. |
|l6= Avian Encephalomyelitis#Introduction | |l6= Avian Encephalomyelitis#Introduction | ||
|q7= What species of birds does AE affect? | |q7= What species of birds does AE affect? | ||
Latest revision as of 09:05, 25 August 2011
| Question | Answer | Article | |
| Name the virus that causes avian encephalomyeltits (AE)? | Avian encephalomyelitis-like virus 1 (AEV).
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| Is avian encephalomyelitis virus (AEV) an RNA or DNA virus? | AEV is a single stranded RNA (ssRNA) virus
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| What genus does AEV belong to? | Hepatovirus
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| What family does the virus belong to? | Picornaviridae
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| What are the main economic concerns for breeders and layers about AE? |
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| How is AE spread and what is its epidemiology? |
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| What species of birds does AE affect? |
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| What are the clinical signs of AE? | AE causes the most serious disease in chicks under 3 weeks of age. The clinical signs for this age group are:
Laying hens rarely show clinical signs but the virus causes:
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| How can AE be diagnosed? | The following methods have been used to help diagnose Avian Encephalomyelitis (AE):
All of the above tests indicate exposure to AE but not neccessarily a current infection. Diagnosis can be confirmed by either histopathology or by virus isolation. |
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| What is the distribution of AE? | Worldwide, the disease has been documented in Africa, Asia, Australia, Europe, and North and South America.
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| What is the treatment for AE? | There is no treatment for chicks infected with avian encephalomyelitis (AE).
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| Can chicken and surviving chicks become immune to AEV? | Yes, surviving chicks, infected hens and birds that have been vaccinated will be immune to AE for life.
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| How many serotypes are there for AEV? | There is only one serotype for the AEV.
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| How can AE be controlled? | Vaccination of pullets several weeks before they come into lay. There are live and attenuated vaccinations available which can be administered in drinking water or as an eye drop, the latter being more effective.
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