studies with flv infected mice , a model for retrovirus induced acquired immunodeficiency , showed that intact lipopolysaccharide rich extract from serratia marcescens as well as the nontoxic polysaccharide derivative free of lipid a were equally adjuvantic in enhancing antibody formation to sheep erythrocytes , both in vivo and in vitro .
C0023810
lipopolysaccharide
C0023767
lipid a