The article deals with application of ultrasonic atomisation for immunoprophylaxis of poultry against viral diseases. Principles of liquid droplet formation from vaccine suspensions in which cavitation and resonant capillary wave break-ups are generated by means of an ultrasonic field have been analysed. A three-way optimisation process has been applied: results from medical inhalation theory have been used for optimisation of droplet size and distribution; frequency of the ultrasonic field has been determined which generates droplets of given size, and an ultrasonic transducer has been designed for generation of the ultrasonic field which could provide production of required aerosol quantity. Results of research in an experimental vaccination equipment show increased efficiency of the method in comparison to others.
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