Nosocomial infections, also known as hospital-acquired infections (HAIs), are infections that patients contract while receiving treatment in a healthcare facility. These infections were neither present nor incubating at the time of admission. Common sites include the urinary tract, surgical wounds, and the respiratory system. They significantly increase patient morbidity, prolong hospital stays, and raise healthcare costs across Nigerian hospitals. Pathogens often spread through contaminated hands of healthcare workers, medical devices, or the hospital environment.
Infection transmission follows a continuous six-link chain. Breaking any single link stops the spread of disease.
Standard precautions form the foundational level of infection control. Nurses must apply them to every patient, regardless of their diagnosed or suspected infection status. These measures assume that every bodily fluid, secretion, and excretion—except sweat—may contain transmissible infectious agents.
Key components include:
When standard precautions alone are insufficient, nurses implement transmission-based precautions tailored to the specific route of pathogen spread.
Hand hygiene is the single most effective measure to prevent cross-contamination in clinical settings. Nurses must perform hand hygiene using either an alcohol-based hand rub or soap and water.
| Situation | Preferred Method | Minimum Duration |
|---|---|---|
| Hands are visibly soiled with blood or body fluids | Soap and water | 40 to 60 seconds |
| Routine care with no visible contamination | Alcohol-based hand rub | 20 to 30 seconds |
| Suspected exposure to spore-forming bacteria like C. diff | Soap and water | 40 to 60 seconds |
The World Health Organization outlines five key moments for hand hygiene: before touching a patient, before clean or aseptic procedures, after body fluid exposure risk, after touching a patient, and after touching patient surroundings.
Personal protective equipment acts as a physical barrier between the healthcare worker and infectious materials. Proper sequencing during donning and doffing prevents self-contamination.
Gloves must never be washed or reused. Nurses should perform hand hygiene immediately after removing any piece of personal protective equipment.
Aseptic technique involves practices designed to keep clients and procedures free from microorganisms. It is critical during surgical procedures, wound dressings, and urinary catheter insertions. Catheter-associated urinary tract infections are among the most common hospital-acquired infections.
Prevention strategies include:
A clean hospital environment reduces the reservoir for infectious pathogens. Hospital surfaces, bedrails, and bedside tables must undergo routine disinfection using appropriate chlorine or chemical solutions.
Proper waste segregation protects healthcare workers and waste handlers:
Nurses act as the first line of defense in tracking and stopping infection outbreaks. Surveillance involves monitoring patients for signs of infection, reviewing laboratory results, and tracking antibiotic usage patterns. When an infection cluster occurs, nurses must report the incident to the hospital infection control committee.
Accurate documentation of wound drainage, vital signs, and antibiotic administration times ensures that interprofessional teams can adjust care plans promptly. Early detection prevents localized infections from escalating into systemic sepsis.