Decreased specific anti-polysaccharide antibody level Specific anti-polysaccharide antibody deficiency is associated with an increased risk of infection with Streptococcus pneumoniae, Haemophilus influenzae type b, and Staphylococcus aureus. Specific anti-polysaccharide antibody deficiency The presence of normal overall immunoglobulin levels with deficiency of specific immunoglobulins directed against bacterial polysaccharides. UMLS:C4021747 Depressed antibody response to polysaccharide antigens Low specific anti-polysaccharide antibody titer HP:0002848 Decreased circulating level of specific antibody