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Δm131Z elicits a reduced inflammatory infiltrate in the livers of infected mice. Samples were prepared from livers of wt- and Δm131Z-infected BALB/c mice harvested 2 days p.i. (a and b) The number of foci of infection observed for the wt (a) and recombinant (b) viruses. Magnification, ×22.75. Foci of infection are marked by arrows. (c and d) The number of inflammatory cells surrounding each focus of infection for the wt (c) and Δm131Z (d) viruses. Magnification, ×36.4.
