{HEAD ~ An immunogenically active component} useful for preventing or ameliorating {TAIL ~ equine protozoal myoencephalitis disease} which comprises merozoite antibody inducing whole cells of a Sarcocystis neurona isolate designated SNg, having ATCC Accession No PTA 2972 or a subculture thereof 
useful for preventing
{ HEAD ~ An immunogenically active component } useful for preventing or ameliorating { TAIL ~ equine protozoal myoencephalitis disease } which comprises merozoite antibody inducing whole cells of a Sarcocystis neurona isolate designated SNg , having ATCC Accession No PTA 2972 or a subculture thereof
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