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)