Bacterial pathogen colonization

Bacterial pathogen colonization is the process by which bacteria survive, adhere, and multiply on or within host tissues or surfaces (skin, mucous membranes, gastrointestinal tract, etc.) without necessarily causing symptoms or clinical disease[1][5][6][7]. It is distinguished from infection by the absence of tissue damage, immune response, or overt clinical symptoms. Colonization can be the initial step leading to infection—especially in immunocompromised individuals or those with disrupted microbiomes—and serves as a reservoir for transmission, particularly in healthcare settings. Different bacteria exhibit specific colonization mechanisms, such as adhesin proteins binding to host extracellular matrix, biofilm formation, and immune evasion. The transition from colonization to infection depends on host immunity, microbial virulence, and environmental factors[2][1][3]. Interventions target the eradication of colonizing bacteria through decolonization strategies, proper infection prevention, and management of associated risks. In summary, "Bacterial pathogen colonization" is a biological process involving multiple species and mechanisms; it is not a single molecular target, and does not fit conventional drug target classification.

Other names

Colonization by bacterial pathogenBacterial colonizationPathogen colonization