LDA Order Portal › Bacterial Antigen - PKBS mix Image 1 of 1 Bacterial Antigen - PKBS mix $60.00 Includes one vial of the bacterial mix P/K, Bacteroides and Streptococcus . This vial contains over 50 doses. Quantity: Add To Cart Added! Includes one vial of the bacterial mix P/K, Bacteroides and Streptococcus . This vial contains over 50 doses.