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Asepsis

Asepsis

The condition of being free from disease-causing living pathogens is asepsis. Aseptic techniques include a set of standard practices to achieve asepsis. An example is the regular environmental cleaning of all parts of the healthcare facility and hand hygiene at home before preparing or eating food. Medical and surgical asepsis in healthcare practice protects patients from harmful pathogens, minimizes the risk of contamination of susceptible sites, and reduces the risk of infection transmission.

Key Techniques in Microbiology

Key Techniques in Microbiology

Aseptic techniques prevent contamination, ensure experimental accuracy, and protect researchers and microbial cultures. These techniques are essential in clinical, industrial, and research settings where sterility is required.Maintaining Sterility in Laboratory PracticesScientists maintain sterility by sterilizing tools with heat or chemicals, disinfecting work surfaces, and handling cultures in controlled environments. Working near an open flame or within a laminar flow hood reduces the risk...

Hand hygiene

Hand hygiene

Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
Hand washing...

Techniques for Isolation of Pure Cultures

Techniques for Isolation of Pure Cultures

Microorganisms are routinely cultured in the laboratory using various techniques to isolate, grow, and quantify them for further study. These methods rely on inoculating microorganisms into a suitable growth medium under aseptic conditions to prevent contamination. Depending on the objective, inoculation can involve direct transfer or the use of diluted bacterial suspensions as the inoculum.Streak-Plate Method for IsolationThe streak-plate method is a common technique for obtaining pure...

Special Staining Techniques

Special Staining Techniques

Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...

Methods of Sterilization II: Chemical Methods

Methods of Sterilization II: Chemical Methods

In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...

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Related Experiment Video

Updated: Jun 27, 2026

Aseptic Laboratory Techniques: Volume Transfers with Serological Pipettes and Micropipettors

Aseptic Laboratory Techniques: Volume Transfers with Serological Pipettes and Micropipettors

Published on: May 31, 2012

Aseptic technique.

Tomasz Bykowski¹, Brian Stevenson

¹Center for Medical Education, Warsaw, Poland.

Current Protocols in Microbiology

|November 20, 2008

Summary

This summary is machine-generated.

Learn aseptic techniques to prevent laboratory culture contamination (sepsis). This guide covers Bunsen burner and laminar flow hood methods for essential tasks like pipetting and microbial inoculation.

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Last Updated: Jun 27, 2026

Aseptic Laboratory Techniques: Volume Transfers with Serological Pipettes and Micropipettors

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Aseptic Laboratory Techniques: Plating Methods

Aseptic Laboratory Techniques: Plating Methods

Published on: May 11, 2012

Area of Science:

Microbiology
Laboratory Science

Background:

Maintaining sterile conditions is crucial in microbiology to prevent culture contamination.
Contaminated cultures can lead to inaccurate experimental results and wasted resources.

Purpose of the Study:

To describe common laboratory procedures for reducing culture contamination.
To provide general protocols for aseptic technique applicable to various lab tasks.

Main Methods:

Describes two primary strategies: using a Bunsen burner and a laminar flow hood.
Details protocols for pipetting, dispensing, media preparation, and microbial inoculation, passaging, and spreading.

Main Results:

Aseptic technique significantly reduces the risk of sepsis in laboratory cultures.
Standardized protocols ensure consistency and reliability in microbial work.

Conclusions:

Implementing aseptic techniques is essential for reliable microbiological research.
Proper use of Bunsen burners and laminar flow hoods are key to preventing contamination.