New Castle's Disease or ND, is a viral disease that results in high mortality and is very infectious. Today, most farms have 1 or 2 ND vaccinations for their broiler program. But inspite of this preventive measures, there still sporadic outbreaks and this usually happens during the rainy season. So if there is an outbreak, it will probably best to revaccinate the whole flock with a more potent ND live vaccine (such as La Sota) but it is recommended that the vaccine be applied thru spray vaccination. Although not widely used in Indonesia, spray vaccination is usually the method of choice because; 1) the vaccine enters the nasal passages thereby ensuring faster delivery; 2) it can be done quickly ( you need just 15 minutes to spray a 5,000 population farm), and 3) it is very easy to do.
So in cases when there is an outbreak of ND in your farms, then the best way to control the mortality and the spread of the disease is thru spray vaccination.
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