New York Senator Daniel Squadron and Assemblyman A. Brian Kavanagh have announced a proposal to mandate vaccination against SE, according to The Associated Press. It is unclear whether the requirement will be for hens producing eggs in New York or for eggs introduced into the state.
Although vaccination will not absolutely guarantee freedom from egg-borne infection of consumers, administration of both attenuated live mutant ST vaccine to pullets and inactivated SE emulsion prior to transfer is being adopted as an industry practice.
A comprehensive program to prevent SE incorporates vaccination but also involves effective biosecurity, rodent control, prerequisite flock monitoring, egg washing and maintaining a cold chain of under 45F from packing through to point of sale. In combination these measures will reduce the probability of infection to almost zero.