FAO REGIONAL WORKSHOP ON NOTIFIABLE AVIAN INFLUNZA IN SOUTHERN AFRICA PRETORIA (SOUTH AFRICA ) 07 - 09 MARCH 2006. HIGHLY PATHOGENIC AVIAN INFLUENZA: EPIDEMIOLOGICAL SITUATION AND AU/IBAR STRATEGY FOR PREVENTION AND CONTROL. CONTENT. 1. EPIDEMIOLOGICAL SITUATION IN AFRICA
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HIGHLY PATHOGENIC AVIAN INFLUENZA: EPIDEMIOLOGICAL SITUATION AND AU/IBAR STRATEGY FOR PREVENTION AND CONTROL
2.1. BEFORE OUTBREAKS
- CONTROL AND/OR ERADICATION
Option 1: Stamping out
- Destruction of infected and at-risk (depending on likelihood that birds are infected) poultry.
- As quickly as possible (within 24 h)
- Samples taken
- Vaccination of workers applying culling.
- Humane destruction
- Accurate records
Option 2: Modified stamping out using vaccination
- - Destruction of infected poultry
- USE OF VACCINATION: Reduces susceptibility to infection and decreases shedding therefore reduces the incidence of new cases and viral load in the environment. Tool to maximize bio-security.
- Vaccination in response to an outbreak: ring vaccination or vaccination of designated high-risk poultry.
Option 3: Blanket vaccination
-Pre-emptive “baseline” vaccination of all part of a population of poultry may be used if the risk of infection is high and/or the consequences of infection are very serious.
In addition to all 3 options:
- Movement of items from infected zones
- Border controls
CHOICE OF OPTION: COUNTRY DECISION BASED
- Epidemiological situation: national and regional
- Available resources: human, financial etc
- AO relevant information
2.2. Suggested strategy to address the current situation
- delay in laboratory confirmation
- Difficulties in sending samples to reference laboratories
- Difficulties to determine the source of infection
- Absence of means to implement the modified stamping without vaccination strategy
- Stamping out: country with 50 million
1% of chicken population and 3 $/head: 1,500,000 $
5% of chicken population and 3 $/head: 7,500,000 $
10%: 15,000,000 $
750 000 $
+/- cost of vaccination and + cost of other measures
In modified stamping out: half to be vaccinated
0.5 % 250 000 heads X 0.1 $/head X 2 X 2: 100,000 $
2.5 %: 500,000 $
5 %: 1,000,000 $
+ personnel, vaccine storage and transport etc
80 %: 16,000,000 $ + personnel, vaccine storage and transport etc