Disinfection in Healthcare: Types, Methods and Frequency

Disinfection is one of the measures used in healthcare to reduce infection transmission and help control outbreaks. Pathogens can contaminate instruments, surfaces, hands and water. Hospitals, clinics and inpatient services therefore need particular attention to hygiene, equipment reprocessing and environmental cleaning, alongside other infection-control measures.

Types of processing in use

The original article groups the processing of rooms and objects into three approaches, which may be combined where appropriate:

• Chemical processing.
• Physical processing.
• Mechanical cleaning.

Its physical-method examples include ultraviolet irradiation, described in the Russian source as quartz-lamp treatment, as well as steam, high temperatures and pressure. Heat may form part of linen processing, while steam under pressure is used in autoclaves for suitable instruments. These applications have different purposes and requirements: pressure alone does not establish disinfection or sterilisation, and UV exposure is not a universal method for processing every surface or object.

The source describes physical methods as reliable and lists four claimed advantages:

• Environmental safety.
• Affordability.
• Ease of use.
• Universal applicability.

These are broad descriptions rather than guarantees. Effectiveness, safety, cost and ease of operation depend on the system, its validated use, staff training and the material being processed. Heat, moisture and UV may be unsuitable for particular items; an effective method for one task cannot simply be transferred to another.

Chemical disinfection uses products formulated for a specified purpose. The source mentions chlorine-based solutions, alcohol products and cationic surfactants, including quaternary ammonium compounds. CDC’s review of chemical disinfectants explains that these agents differ in antimicrobial activity, limitations and material compatibility. Select an authorised product for the intended task and follow its instructions, rather than treating the different classes as interchangeable.

Mechanical work includes ordinary cleaning, airing rooms where permitted, removing soiled linen and cleaning surfaces with water and an appropriate detergent. This removes soil and some microorganisms; it is not the same as killing them by disinfection. Opening windows must also respect the room’s ventilation design and infection-control requirements.

The article additionally describes biological disinfection using organisms that act against pathogenic microbes, and says it is used only exceptionally. It identifies no organism, product or validated procedure. This broad historical description should not be treated as an established routine hospital method or permission to introduce biological agents into patient-care areas.

Air, linen and instrument processing

Processing should follow the facility’s documented procedures and schedule. Frequency depends on the task, contamination, patient vulnerability and exposure risk, as well as applicable requirements. CDC environmental-cleaning guidance distinguishes routine, scheduled and terminal cleaning, with prompt action for spills. A room-cleaning timetable does not replace the required reprocessing of a reusable instrument between uses. The archived article provides no specific interval or complete current regulatory schedule.

The source describes UV systems for air treatment, including enclosed units intended for occupied rooms and exposed lamps operated after cleaning when nobody is present. An enclosed casing alone does not prove safe occupied-room use: that depends on the actual device, installation, maintenance and instructions. Exposed room-treatment lamps require controls that prevent people from being exposed. CDC/NIOSH guidance on germicidal UV explains that professionally designed upper-room systems can treat air above occupants as a supplementary measure. Misdirected or reflected UV can harm eyes and skin; UV does not replace ventilation, filtration or surface cleaning.

The article also describes closed-cycle air-treatment installations in rooms used for surgery and maternity care, claiming that they maintain an impeccably clean environment. Such areas need controlled environmental conditions, but a room is not literally sterile or protected from every source of contamination. CDC environmental infection-control recommendations address engineered ventilation, filtration and room-specific airflow. These systems must be appropriate to the clinical area; recirculation alone is not proof of safe air treatment.

Linen is handled in appropriate groups, with processing matched to soiling, textile requirements and the facility’s infection-control plan. The source describes preliminary steam and hot-air treatment and says the process removes all pathogens, including for linen outside infectious-disease wards. Neither that sequence nor complete microbial elimination should be assumed for every textile. CDC laundry guidance describes combined mechanical, thermal and chemical action producing hygienically clean linen, which is generally not sterile. Certain surgical textiles require additional sterilisation; clean linen must be protected from recontamination.

Instruments need a process suited to their intended use and materials. An autoclave uses controlled steam, temperature, pressure and exposure within a validated cycle; it cannot compensate for inadequate cleaning or unsuitable loading. For items intended to be stored sterile, cleaning, drying, inspection and the required compatible packaging come before sterilisation. After the cycle, drying and careful handling must preserve the processed packs, which are stored in suitable cabinets or designated storage areas. CDC guidance on sterilising practices supports preparation before the cycle, process monitoring and protected storage. Wrapping an exposed instrument afterwards does not retrospectively create a sterile pack.

The distinction between processes matters. Cleaning removes soil; disinfection acts against pathogenic microorganisms on objects but does not necessarily destroy bacterial spores. Sterilisation is intended to eliminate viable microbial life, including those spores, through an appropriate validated process. The CDC definitions of cleaning, disinfection and sterilisation also explain why the required level depends on an item’s use. Critical instruments require sterilisation; preparing an operating theatre involves environmental cleaning and disinfection, rather than sterilising the entire room.

Preventive and infection-focused cleaning

The source distinguishes two purposes for disinfection:

• Infection-focused disinfection.
• Preventive disinfection.

Preventive work addresses the possibility of infection transmission, including in crowded areas such as clinic lobbies and consulting rooms. Methods and frequency should reflect the actual setting and risks rather than the room’s name alone.

Where infectious contamination is known or suspected, additional measures may be needed, particularly in inpatient and infectious-disease care. The source describes a combination of chemical wet cleaning and regular UV treatment in wards. The facility should select measures for the relevant organism and transmission route; UV is an additional, system-specific option, not a compulsory substitute for cleaning or a guarantee against an outbreak.

Additional disinfection methods

The archived article also lists five methods or practices:

• Covering biological material with a dry treatment agent. The source presents this as effective without identifying a product or procedure. Powder treatment of biological material belongs only within a facility-authorised, validated spill or waste protocol; this description supplies no preparation or application instructions.
• Soaking in a disinfectant solution. Use only the product and item manufacturer’s authorised process. Immersion does not automatically achieve sterilisation.
• Applying or spraying a chemical product. Follow product-specific application and exposure precautions. This does not authorise spraying occupied rooms or improvised air disinfection.
• Incineration. This concerns authorised treatment of suitable hazardous waste, not the reprocessing of reusable instruments. WHO’s healthcare-waste guidance explains that inadequate incineration and unsuitable waste can release harmful pollutants, and that alternative treatment methods should be considered.
• Repeated wiping. The source mentions medical containers, utensils and other objects. Use a compatible process and the required disinfectant contact time. Repeated passes alone do not demonstrate disinfection or sterilisation.

Methods and the required level of disinfection depend on the infection risk and intended use. The source says a combination of mechanical, physical and chemical measures is almost always used and eliminates every threat. Combined measures can reduce risk, but not every item needs all three methods and no such general guarantee is justified. CDC disinfection recommendations emphasise appropriate processing, product instructions and material compatibility, and advise against routine disinfectant fogging in patient-care areas.

Hygiene also matters in homes. The source includes dry and wet surface cleaning, handwashing, and washing fruit and vegetables. These tasks require different approaches: a surface disinfectant is not a hand or food cleaner. FDA advice on cleaning produce recommends plain running water; do not apply soap, bleach or household disinfectants to fruit and vegetables.

Keep toilets and kitchen areas clean, using cleaning products suitable for the surfaces. The source mentions chlorine-containing products and surfactants for sanitary areas, and specialist detergents for kitchens. Choose any disinfectant according to the actual need and label, including precautions and food-contact requirements. Do not mix cleaning chemicals.

When someone at home is ill, more frequent wet cleaning or additional disinfection may be appropriate. The source suggests separate utensils and processing personal clothing, bedding and dishes; extra precautions should follow guidance for the particular infection rather than become a universal rule for every illness. CDC home-cleaning guidance covers regular cleaning, additional disinfection when needed, and laundering with detergent at the recommended temperature followed by complete drying. Household linen and dishes should not automatically be treated like instruments requiring sterilisation.

Original source: Zaplata — Disinfection in medicine: types, features and frequency of procedures. Russian article on MEDICTUR.