In the past (five to 10 years ago) avian influenza, was pretty much the only serious poultry disease which South Africa did not have.
There have been cases of what is called low pathogenic avian influenza in ostriches for some time.However, the commercial poultry industry was, for a long time, free of the highly pathogenic strain of the virus. This is now, unfortunately, no longer the case. In the past, Veterinary Services was reluctant to allow vaccination of poultry in South Africa against AI.
Firstly, there is a well-organised and run surveillance system in place for AI in SA. The basis of this monitoring programme is routinely looking for antibodies against AI in commercial poultry. This surveillance system is only possible if the birds are not vaccinated. The control policy in the past was a “stamping-out” policy. In other words, when AI is detected in a flock, it is destroyed.
To maintain the supply of both meat and eggs, there is a complex system of breeder birds, grandparents and great grandparents. These breeders are genetic line birds and play a critical role in keeping the market supplied with poultry products.If they contract AI, they will die . When this happens, the supply of hatching eggs needed to keep the layer and broiler farmers supplied with chickens to meet the demand for poultry products will be gone.
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