HEAL ▶▶▶TH
Designer vaccines for free range poultry
BY JUDITH WANINGE T
he changing methods for keeping poultry, from cage and aviary to free range, paired with more ef- ficiently bred hens with intact beaks, provides a breeding ground for disease on laying hen farms.
The more stressors, the more sensitive the birds are to path- ogens. ‘Forgotten’ diseases may reappear, infections that are difficult to control with commercial vaccines. A specific farm vaccine, also known as an autovaccine or farm-specific inoc- ulation, may offer poultry famers a potential solution. Need- less to say, this will only be successful in close consultation with the farm vet. “The big advantage of an autovaccine is that it contains a farm-specific pathogen that protects birds against a specific disease at the farm that cannot be entirely combated with a standard vaccine,” says Marcel Boereboom. The Dutch veteri- narian has seen an increase in the use of autovaccines in
Preventative veterinary care is gaining in importance but vaccinations offer no panacea. That said, farm- specific inoculations are becoming more mainstream. Autovaccines, tailored per farm, can provide a solution to the many different E. coli strains, erysipeloid and Pasteurella on free range farms.
recent years, in part due to more intensive veterinary assis- tance on poultry farms. “The more we look into specific farm diseases, the better we are able to tailor the vaccine”. A small number of Dutch companies have specialised in pro- ducing farm-specific vaccines. In Germany, 18 companies al- togther are involved in this business. The use of autovaccines is commonplace there. Unlike in the Netherlands, certifica- tion to produce vaccines is mandatory in Germany, stating the specific animal species and the pathogen concerned.
With the grow- ing popularity of free range poul- try production, birds encounter long forgotten diseases. Auto- vaccines can help to mitigate the risks.
▶ POULTRY WORLD | No. 10, 2020 11
PHOTO: HERBERT WIGGERMAN
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