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Immunofluorescent images demonstrating protein gene product (PGP)-immunoreactivity in the intestinal wall of the mouse colon from (A) uninfected NOS1null, (B) infected NOS1 null, (C) uninfected NOS2 null, (D) infected NOS2 null, (E) uninfected wild-type (WT), and (F) infected WT. This figure appears in color at www.ajtmh.org.
