Trisaccharide 13a represents a small A-type epitope. confers protective efficacy to vaccines, its presence results in comparable antibody profiles in infected and vaccinated animals. Consequently, differentiation of infected from vaccinated animals (DIVA) is not possible, and this limits efforts to combat the disease. Recent clarification of the chemical structure of OPS as a block copolymer … Continue reading Trisaccharide 13a represents a small A-type epitope