Tryptic Soy Blood Agar Base 2 Difco 227200, 10Kg. Used with blood for improved beta-hemolytic reactions and for cultivation of fastidious microorganisms. Tryptic Soy Blood Agar Base 2 Difco 227200 - buy online through Voigt Global Distribution, your dealer distributor for all BBL DIFCO BD Microbiology products.