Only the serotype 2 vaccine was discussed as potentially increasing the severity of LL symptoms. Since the vaccine available to small breeders is serotype 3, I don't see why not.I think we can eliminate diet, and pronounce sub-clinical LL as the diagnosis with high confidence.
Will this change your future Mareks vaccination plans, or because you aldready have vaccinated birds, you will continue the practice, even with the risk of additional LL cases in the future?