Summary
Sterile handling prevents contamination when growing microbes or cells.
In depth
Work near a flame, sterilise loops, minimise exposure to air, seal dishes. Incubate at 25 °C in schools to avoid growing human pathogens.
Sterilise instruments, work close to a flame, and flame bottle necks. Do not open dishes needlessly.
Common mistake: sealing dishes completely allows anaerobic pathogens to grow; tape only partially.
Aseptic technique prevents contamination of cultures by unwanted microbes and protects the worker from the culture. Steps include disinfecting the bench, working near a Bunsen flame (which creates an updraught), sterilising loops by flaming until red hot, and flaming the necks of bottles.
Agar plates are inoculated, lids opened only briefly and held close, then sealed with tape and incubated upside down to avoid condensation dripping onto the culture, at about 25 degrees Celsius in schools to avoid human pathogens. Equipment and media are sterilised in an autoclave (121 degrees Celsius, 15 minutes). Discard cultures after autoclaving.
Example: a clear zone around an antibiotic disc shows inhibited growth.
Frequently asked questions
What is Aseptic Culture Technique?
Sterile handling prevents contamination when growing microbes or cells.
Which area of biology covers Aseptic Culture Technique, and how advanced is it?
Aseptic Culture Technique is one of the 51 topics in Lab Methods & Biostatistics. It is rated Intermediate, so it suits learners who already know the core vocabulary. Related topics in this area include Lab Safety, Measuring and Units, Laboratory Automation.
Why does Aseptic Culture Technique matter?
Contamination ruins results and can be dangerous.
Can you give an example of Aseptic Culture Technique?
Streak plating isolates single colonies.
What should I learn before Aseptic Culture Technique?
Work through the Beginner topics in Lab Methods & Biostatistics first, such as Scientific Method, Hypothesis, Variables, then return to Aseptic Culture Technique. Intermediate topics assume the Beginner vocabulary.
What topics are related to Aseptic Culture Technique?
The closest topics to Aseptic Culture Technique are Lab Safety, Measuring and Units, Laboratory Automation, Ethics in Research. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Aseptic Culture Technique?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Aseptic Culture Technique. To practise the whole of Lab Methods & Biostatistics, use the Lab Methods & Biostatistics quiz.
How is Aseptic Culture Technique different from Lab Safety?
Aseptic Culture Technique: Sterile handling prevents contamination when growing microbes or cells. Lab Safety: Following procedures for glassware, chemicals, biological samples and disposal prevents accidents. Read both side by side and note what each one explains.
What is a common mistake about Aseptic Culture Technique?
Sealing dishes completely allows anaerobic pathogens to grow; tape only partially.
How should I study Aseptic Culture Technique step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Lab Safety and explain the difference aloud. Finally, take the Lab Methods & Biostatistics quiz and come back to this page for any question you miss.