Question
List sources of healthcare-associated infections and respective preventive measures
Answer
Sources of healthcare-associated infections (HAIs) and respective preventive measures:
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Source: Contaminated hands of healthcare workers (the single most important vector of cross-transmission). Prevention: strict hand hygiene compliance (WHO’s “5 moments for hand hygiene”), using alcohol-based hand rub or soap-and-water handwashing.
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Source: Invasive medical devices (urinary catheters, central venous lines, endotracheal tubes) — biofilm formation on device surfaces. Prevention: adherence to aseptic insertion technique, use of device care bundles, minimizing duration of device use, and prompt removal once no longer clinically necessary.
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Source: Contaminated environment/surfaces (bed rails, equipment, high-touch surfaces). Prevention: regular environmental cleaning and disinfection with appropriate disinfectants, following standard cleaning protocols.
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Source: Contaminated/improperly reprocessed medical equipment (endoscopes, surgical instruments). Prevention: proper sterilization/high-level disinfection following Spaulding’s classification, and rigorous reprocessing protocols.
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Source: Surgical site contamination. Prevention: appropriate pre-operative antiseptic skin preparation, surgical hand scrub, aseptic technique during surgery, and appropriate peri-operative antibiotic prophylaxis where indicated.
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Source: Patient-to-patient transmission (cross-infection), particularly of multidrug-resistant organisms. Prevention: implementation of standard precautions for all patients, and transmission-based precautions (contact, droplet, airborne) for patients with known/suspected transmissible infections, including appropriate patient isolation/cohorting.
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Source: Contaminated air (airborne transmission) in operating theatres/isolation areas. Prevention: appropriate ventilation systems (HEPA filtration, negative-pressure isolation rooms for airborne infections).
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Source: Healthcare worker as a carrier/infected individual. Prevention: staff health screening, appropriate use of personal protective equipment, and exclusion of symptomatic staff from patient care duties as per infection-control policy.
Overarching preventive framework: implementation of standard precautions for every patient contact, active surveillance for HAIs, antimicrobial stewardship to limit resistance development, and a functioning hospital infection control committee overseeing policy and staff training.