Infection Prevention and Control
Infection prevention and control (IPC) is the body of evidence-based practices and organisational measures that aim to interrupt the transmission of microorganisms within health care settings and to protect patients, staff, and visitors from health-care-associated infection. As a foundational domain of nursing, it spans hand hygiene, aseptic technique, protective equipment, isolation precautions, decontamination of devices and surfaces, and prevention of exposure to bloodborne pathogens.
Definition
Infection prevention and control is the discipline concerned with preventing or limiting the transmission of infectious agents in health care, combining individual practices (such as hand hygiene and aseptic technique) with environmental, organisational, and surveillance measures to reduce health-care-associated infection.
Scope
This area orients the learner to the principles that underpin safe nursing practice against infection: the chain of infection, the rationale for standard and transmission-based precautions, and the system-level factors that make prevention reliable. It introduces five core topics — hand hygiene and asepsis, personal protective equipment, standard and transmission-based precautions, sterilization and disinfection, and bloodborne pathogen exposure prevention — and treats them as a reference framework rather than as procedural or prescriptive instruction.
Sub-topics
Core questions
- How is the chain of infection interrupted at each link by nursing practice?
- Which measures apply to every patient encounter, and which are triggered by a specific mode of transmission?
- How do individual technique and organisational systems jointly determine whether prevention succeeds?
- How are devices, equipment, and the care environment rendered safe between patients?
Key concepts
- Chain of infection
- Health-care-associated infection
- Modes of transmission (contact, droplet, airborne)
- Standard precautions
- Transmission-based precautions
- Asepsis and aseptic technique
- Multimodal improvement strategy
- Surveillance and audit of compliance
Mechanisms
IPC works by breaking the chain of infection — the sequence linking an infectious agent, a reservoir, a portal of exit, a mode of transmission, a portal of entry, and a susceptible host. Nursing practice targets the modifiable links: hand hygiene and surface decontamination remove or kill organisms before they reach a portal of entry; protective equipment and isolation precautions interrupt contact, droplet, and airborne transmission; and sterilization and disinfection eliminate microbial contamination on devices. Because reliability depends on more than individual diligence, the World Health Organization frames effective IPC as a multimodal strategy that pairs technique with system change, training, reminders, and feedback (who-hand-hygiene-2009; allegranzi-multimodal-2013).
Clinical relevance
Infection prevention and control underlies safe care across every clinical setting, and competence in it is a defining expectation of nursing practice. The topics in this area describe how transmission is interrupted and how evidence on prevention is generated and appraised; they are educational reference material and are not a substitute for local policy, occupational-health protocols, or individualised clinical judgement.
Epidemiology
Health-care-associated infections affect a substantial share of hospitalised patients worldwide and contribute to avoidable morbidity, mortality, and cost. Studies of hospital-wide programmes have linked sustained improvements in hand-hygiene compliance with reductions in infection and transmission, and the WHO multimodal strategy has been associated with improved compliance across diverse settings (pittet-program-2000; allegranzi-multimodal-2013).
History
Modern infection control grew from nineteenth-century insights into contagion and antisepsis and was consolidated in the twentieth century with the rise of hospital epidemiology, isolation systems, and standardised precautions. The 1980s HIV epidemic prompted universal — later standard — precautions applying to all patients, and the WHO's 2009 guidelines and 'My Five Moments for Hand Hygiene' framework brought a unified, evidence-graded approach to the field's most fundamental practice (who-hand-hygiene-2009; siegel-isolation-2007).
Debates
- Why does compliance lag behind knowledge?
- Even where staff understand the evidence, observed adherence to core measures such as hand hygiene is often incomplete; whether the remedy lies chiefly in individual behaviour change or in system redesign, reminders, and feedback remains a central question for the field.
Key figures
- Didier Pittet
- Benedetta Allegranzi
- Jane D. Siegel
- John M. Boyce
Related topics
Seminal works
- who-hand-hygiene-2009
- siegel-isolation-2007
- pittet-program-2000
Frequently asked questions
- What is the difference between infection prevention and infection control?
- The terms are usually used together as a single discipline (IPC). In common usage 'prevention' emphasises stopping infection from occurring, and 'control' emphasises limiting spread once an infectious agent is present, but both rely on the same core practices and are not sharply separated.
- What is the chain of infection?
- It is a model describing the six linked elements required for transmission — infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host. Infection prevention works by interrupting one or more of these links.