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Antileishmanial DTH response in the BALB/c mice. I, normal mice; II saline-treated infected mice; III, normal mice primed with 108 UR6 organisms; IV, infected mice primed with 108 UR6 organisms. Sonicated UR6 was given to the primed animals as described in the text. Animals were injected with UR6 on days 0, 15, and 30, and 15 days after the last injection, animals were injected with L. donovani amstigotes.
