Disinfection
Disinfection - Related Videos
01:30
Cleaning, Sterilization, and Disinfection
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2023
Cleaning, disinfection, and sterilization are the methods that help to break the infection chain and prevent disease. Cleaning The cleaning process usually involves using water with detergents or enzymatic cleaner and removing foreign material from objects and surfaces, including organic material such as body fluids or inorganic material like soil. Cleaning is performed before high-level disinfection and sterilization because foreign materials on the cover of the devices interfere with process...
06:57
Determining Viral Disinfection Efficacy of Hot Water Laundering
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2022
In response to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, a laboratory protocol was developed to test the viral disinfection efficacy of hot water laundering of cloth face coverings, cotton scrubs, and denim pants. The Phi6 virus (bacteriophage) was used as the organism to test disinfection efficacy.
08:53
Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 2. General Practices
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Cited by 7 •
2016
Performing viral assays in a BSL-4 laboratory is more involved compared to work in a BSL-2 laboratory due to required additional safety precautions. Here, we present an overview of practices and procedures used inside a BSL-4 laboratory illustrating proper Class II biosafety cabinet usage, waste management/disposal, and sample removal.
04:30
COVID-19 / Coronavirus Outbreak: Doffing Personal Protective Equipment When Exiting A Patient Room
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2020
In pandemic times, medical staff is becoming a key resource in fighting the infection. To achieve the best medical care, relevant techniques and procedures have to be taught to medical staff to reduce the risk of infection. Doffing the contaminated personal protective gear after treating COVID-19 patients has a high risk of forming infective aerosols which could lead to an infection of the medical staff. In this video, the manner of doffing of personal protective gear to minimize the risk of...
06:19
Decontamination for Laboratory Biosafety
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2023
Robert M. Rioux and Zhifeng Chen, Pennsylvania State University, University Park, PA Decontamination is essential for laboratory biosafety, as the accumulation of microbial contamination in the laboratory can lead to the transmission of disease. The degree of decontamination can be classified as either disinfection or sterilization. Disinfection aims to eliminate all pathogenic microorganisms, with the exception of bacterial spores on lab surfaces or equipment. Sterilization, on the other hand,...
FAQs
Disinfectants can act by disrupting cell membranes, denaturing proteins, damaging nucleic acids, or creating environmental conditions that microorganisms cannot survive. These mechanisms attack different cellular structures and processes, so the selected agent matters. Understanding the dominant damage pathway helps explain why a treatment may reduce contamination effectively without reliably eliminating every microbial form.
Concentration and contact time determine whether microorganisms receive sufficient exposure to the disinfectant, while temperature can alter the treatment’s effectiveness. Organic matter is also important because its presence can interfere with the process. Consequently, applying an otherwise suitable agent under poorly controlled conditions may produce less reliable microbial reduction than expected.
Disinfection can reduce or eliminate many pathogenic microorganisms, but it may leave some microbial forms, including resistant spores, behind. Sterilization represents a more complete level of microbial destruction. This distinction matters in biology because the required level of contamination control depends on whether reducing pathogens is sufficient or whether all microbial forms must be addressed.
A sound procedure considers the material or liquid being treated, the disinfectant selected, its concentration, the required contact time, temperature, and the amount of organic matter present. These variables should be considered together rather than in isolation. Matching the method to the treatment conditions improves the likelihood of consistent contamination control.
In biological laboratories, disinfection supports aseptic technique and biosafety by helping control contamination on relevant surfaces, materials, or liquids. Its value extends beyond routine cleanliness: reliable treatment can help limit the spread of microorganisms during laboratory work. The method must still be selected and applied with awareness of resistant microbial forms and operating conditions.
Disinfection contributes to healthcare practices and water treatment by reducing microorganisms associated with contamination and disease transmission. In these settings, effectiveness depends on selecting an appropriate agent and controlling exposure conditions such as concentration and contact time. The outcome is contamination reduction, although disinfection should not automatically be interpreted as complete microbial elimination.