Enteropathogenic Escherichia coli (EPEC)

Enteropathogenic Escherichia coli (EPEC) is a significant Gram-negative bacterial pathogen and a leading cause of infantile diarrhea worldwide, particularly in developing nations. Unlike other E. coli strains, EPEC does not produce toxins but instead utilizes a complex Type III secretion system to inject effector proteins directly into host intestinal epithelial cells. This process leads to the formation of characteristic attaching and effacing (A/E) lesions, marked by the destruction of microvilli and the assembly of actin-rich pedestal structures that anchor the bacteria to the cell surface. While EPEC is an organism rather than a single molecular receptor, it serves as a primary therapeutic target for antimicrobial agents. Current drug development often focuses on inhibiting its specific virulence mechanisms, such as the interaction between the bacterial surface protein Intimin and the translocated intimin receptor (Tir), to prevent colonization and disease progression.

Other names

EPECAttaching and effacing Escherichia coliA/E E. coli

Antibiotics targeting EPEC typically act by inhibiting bacterial protein synthesis (macrolides), interfering with DNA replication via DNA gyrase inhibition (fluoroquinolones), or disrupting cell wall synthesis (beta-lactams).