Case 10. Biofilm infection of Gram-negative rods (70 y-o M)
　 　 　 　 　
　 　 Small bowel surgically resected for mesenteric arterial thrombosis, accompanying secondary bacterial infection 　 　
　 　 　 　 　
　 　
Key words : 
 biofilm, ischemic colitis, secondary infection, Gram-negative rods, gastric ulcer 　 　
　 　 　 　 　
　 　
opportunistic infection
 　 　
　 　 　
　
　 　 　
Bacterial colonies on the surface of the ischemic mucosa are embedded in the mucoid matrix (HE) 　 The mucoid matrix is strongly positive for acid mucosubstances or slime (colloidal iron)
　 　 　
　
　 　 　
Reference case 10A
Rectal erosion with secondary infection of Gram-negative rods (55 y-o F).　Autopsied rectum with surface erosion and bacterial infection (HE)		 　 Reference case 10A
Rectal erosion with secondary infection of Gram-negative rods (55 y-o F).　E. coli antigens identified along the eroded surface and in the autolytic crypt (immunostaining)
　 　 　
　
　 　 　
Reference case 10B
Gastric ulcer with secondary infection of Gram-positive long rods (67 y-o M).　Long rods densely clustered along the gastric ulcer base (HE)		 　 Reference case 10B
Gastric ulcer with secondary infection of Gram-positive long rods (67 y-o M).　The long rods are partly Gram-positive, suggesting the species of Lactobacillus (Gram)