Difference between revisions of "Newcastle Disease Virus"
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| Line 9: | Line 9: | ||
====Pathogenesis==== | ====Pathogenesis==== | ||
*Transmission via aerosol and direct contact | *Transmission via aerosol and direct contact | ||
| − | *Disease ranges from subclinical | + | *Disease ranges from subclinical respiratory tract infections -> torticollis -> haemorrhages and death |
| + | |||
====Diagnosis==== | ====Diagnosis==== | ||
Two diagnostic tests currently exist: | Two diagnostic tests currently exist: | ||
Revision as of 11:19, 22 May 2010
 |
This article is still under construction. |
Also known as NDV
Hosts
- Gallinaceous birds, pigeons, parrots, finches
- Subclinical carriers: ducks, ostriches
- Causes conjunctivitis in humans
Pathogenesis
- Transmission via aerosol and direct contact
- Disease ranges from subclinical respiratory tract infections -> torticollis -> haemorrhages and death
Diagnosis
Two diagnostic tests currently exist:
- Animal test:
- Samples of trachea and gut of 20 birds are tested in eggs
- HI using anti-NDV serum (to differentiate HA caused by avian influenza
- Virulence of isolate tested by the speed it kills chicks
- DNA test (which will soon replace the animal test):
- Sequencing the cleavage site of H gene
- The more basic amino acids the more virulent the virus
Control
- Newcastle Disease is NOTIFIABLE
- Vaccination of chickens and racing pigeons
- Surveillance of imported exotic birds
- Isolation of infected stock
- Infected premises to be culled and firebreak cull if spread