Figure 1

Progression of L. (L.) mexicana infection in neonatal BALB/c mice. A. Footpad thickness of adult mice infected with 1 × 106 promastigotes (■), non-infected mice (○), neonatal mice infected with 5 × 104 promastigotes (△), neonatal mice infected with 1 × 105 promastigotes (▲), neonatal mice infected with 2 × 105 promastigotes (□) and neonatal mice infected with 5 × 105 promastigotes (●). B. Percentage increase from the starting footpad thickness in both neonatal (□) and (■) adult BALB/c mice infected with 5 × 105 and 1 × 106 promastigotes, respectively.