Analysis of the Virulence of an Atypical Enteropathogenic Escherichia coli Strain In Vitro and In Vivo and the Influence of Type Three Secretion System

Figure 3

Histopathological analyses of the H&E-stained infected rabbit ileum sections. Squares indicate areas magnified in (Figure 3 (a1), (b1), and (c1)). (a) and (a1)—Ileal loop infected with aEPEC 1711-4; (b) and (b1) ileal loop infected with 1711-4 ΔescN; (c) and (c1) ileal loop infected with E. coli HS. Note intense intraluminal polymorphonuclear leukocytes (PMN) infiltrate, red arrow, in (Figure 3(a)). Note moderate PMN tissue infiltration in (a1) and (b1).