Abstract
Optimization of vaccine delivery via spray application of live Mycoplasma gallisepticum (MG) vaccine to commercial caged layer chickens is impacted by many factors. One of these factors is the pressure utilized to dispense the vaccine, which affects both application rate and droplet size. MG vaccine was applied using a self-propelled, constant speed vaccinator operated at two different pressures and using three different nozzles. Droplet size and as-applied coverage and deposition were measured to determine the effects of system pressure and nozzle type on spray characteristics. Vaccine viability was also assessed to determine how viability is affected by the spray application process.
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