Impact of Operating Room Environment on Infection Control

Sir, Surgical site infections (SSIs) remain a formidable challenge in modern healthcare, accounting for a substantial proportion of healthcare-associated infections worldwide and disproportionately affecting patients in low-and middle-income countries. The condition of the operating room also has a significant impact on the incidence of surgical wound infections.[1] SSIs drive morbidity, prolonged hospitalization, antimicrobial use, and excess healthcare costs. While patient-related (endogenous) risk factors such as diabetes, obesity, malnutrition, and immunosuppression are well recognized, procedure-related, and environmental factors within the operation theatre (OT) microenvironment are now clearly established as major, modifiable determinants of infection risk. Depending on the kind of surgery, different microorganisms are separated from infections. In a tidy surgical technique that do not involve the gastrointestinal, gynecologic, or respiratory systems. The most common source of infection is Staphylococcus aureus from the patient’s skin flora. When mucous membranes if skin is cut, indigenous flora may contaminate the exposed tissues.[2,3] These include air quality, traffic patterns, adherence to aseptic technique, adequacy of preoperative skin preparation, timing and duration of antimicrobial prophylaxis, and maintenance of surgical attire and barrier integrity. The design of the operating unit is complex and requires that different areas be correctly integrated. In addition to keeping clean and dirty areas separate, it is important to ensure that patient flow, from arrival to discharge, is orderly and logical.[4] A critical gap in current practice is the discrepancy between what engineering and infection-prevention standards prescribe and what is reliably implemented and maintained over time. Modern guidelines emphasize positive pressure ventilation, adequate air changes per hour, and filtration systems, supported by regular validation and preventive maintenance, yet many OTs do not consistently meet these benchmarks. Controlling traffic and activities is crucial in these areas since the number of people and the amount of activity influence the number of microorganisms that are present and therefore influence the risk of infection. The operating unit should be arranged in progressively less contaminated areas, from the reception area to the operating theatres. Moreover, organizational/functional and/or structural intervention must be implemented in order to ensure that “dirty” and “clean” pathways be kept separate. Maintaining a high quality of the air in the operating theater is essential to controlling the risk of surgical infections to lower health care and morbidity. It is necessary to reduce the expenses related to these diseases, airborne germs, and other sources of contamination.[5] At the same time, outdated practices such as routine fumigation or fogging continue in some centres despite a lack of evidence and clear guidance favouring meticulous surface disinfection, continuous air handling, and environmental monitoring instead. Behavioral non-compliance compounds these structural deficits: frequent door opening, high staff traffic, unnecessary movement and conversation, and inconsistent use or delayed replacement of masks and gloves all increase airborne particle counts and bacterial dispersion. Evidence supports practical, low-cost interventions such as limiting personnel in theater, enforcing “door discipline,” ensuring timely antibiotic prophylaxis (within 60 min of incision for most agents), avoiding prolonged postoperative prophylaxis, and replacing masks and gloves at reasonable intervals when procedures are prolonged or barrier integrity is in doubt. In the Indian context, recent literature highlights a substantial burden of SSIs across a range of surgical specialties, with rates often exceeding those reported from high-income settings and wide inter-institutional variation reflecting differences in infrastructure, staffing, case mix, and process reliability. Multicentric and single-centre Indian studies consistently identify modifiable OT-related contributors such as inadequate ventilation, overcrowding, inconsistent sterilization workflows, incomplete adherence to surgical safety and antibiotic policies, and gaps in microbiological surveillance and feedback. Future research in India needs to move beyond point prevalence and descriptive audits towards implementation science – testing context-appropriate “bundles” that integrate OT engineering standards, human-factors-informed behavioral interventions, real-time environmental and SSI surveillance, and antimicrobial stewardship, with strong administrative backing. Priority areas include robust evaluation of low-cost ventilation and zoning solutions for smaller hospitals, digital or checklist-based monitoring of door openings and staff movement, continuous quality improvement on antibiotic timing and duration, and integration of SSI outcomes into routine hospital performance dashboards. In general, the policy to reduce microbial contamination in OT is based on a behavioral and systemic approach. Preventive interventions in a behavioral approach concentrate on lowering the quantity of airborne particles in the operation room. Since it has been demonstrated that increased activity increases the dispersion of bacteria, simple and inexpensive methods include reducing the number of staff in the operating room and keeping the movements of personnel in the OT to a minimum.[6] Strengthening OT design as per national operational guidelines, ensuring reliable maintenance contracts for Heating, ventilation and air conditioning (HVAC) and sterility systems, and embedding infection prevention training into surgical and anaesthesia curricula are essential changes for Indian setups to meaningfully reduce OT-related infections in the coming years. Financial support and sponsorship None. Conflicts of interest There are no conflicts of interest.