Bacterial Expression of Escherichia coli (image) Arizona State University Caption Figure 1 shows the bacterial expression of Escherichia coli common pilus (ECP) using fluorescence (in green) in biofilm (A) and in contact with cells (B). Both commensal and pathogenic E. coli strains produce ECP. In Avian pathogenic E. coli (APEC) infections, ECP plays an important role in host cell recognition and biofilm formation. Credit The Biodesign Institute at Arizona State university Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.