Faktorinfektion

Faktorinfektion is a term used in some Scandinavian medical contexts to describe infections in which the clinical onset, severity, or outcome is determined by an interaction between a pathogen and one or more host, environmental, or lifestyle factors. The word combines faktor (factor) and infektion (infection). In practice, faktorinfektion is often discussed as a form of co-infection, polymicrobial infection, or opportunistic infection, depending on the context and language.

The concept emphasizes that infection is not driven solely by a single microorganism. Contributing factors may include the immune status of the host (age, immunosuppression, chronic diseases), comorbidities, genetic predispositions, prior antibiotic exposure, wound contamination, nutritional state, and environmental exposures. Pathogen characteristics such as virulence, infectious dose, and the ability to exploit host vulnerabilities also play a role. The interaction between these factors can influence transmission, disease course, and response to treatment.

Clinical implications include a broader diagnostic approach and a treatment strategy that addresses both multiple pathogens when present and modifiable host factors. Management may involve broad or targeted antimicrobial therapy, source control, and interventions to improve immune competence and general health. Prevention focuses on reducing risk factors, vaccination where appropriate, infection control measures, and management of chronic conditions to limit susceptibility to infections.

See also: co-infection, polymicrobial infection, opportunistic infection.