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Salmonella infection in human intestinal xenografts. Human intestinal xenografts were infected with serovar Typhimurium SL1344 for 2 h, embedded in OCT compund, and snap-frozen in methylbutene-dry ice. Histological analysis of Salmonella-infected xenografts showed attachment but no significant Salmonella (red) invasion of the tissue at up to 2 h of infection. (A) Low power view; (B) a higher magnification of the section shown in panel A.
