E.Coli K12 Bacteria Culture
Bacteria Cultures
E.Coli K12 Strain

E.Coli K12 Strain

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£12.95 Exc. VAT
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This product is grown/bred/collected to order.
Quantity must be 1 or more

Gram -ive

Escherichia coli is a Gram-negative straight rod, which either uses peritrichous flagella for mobility or is nonmotile. E coli is commonly found in the lower intestine of warm-blooded animals such as humans. The K12 strain has been modified so it can no longer survive in the human gut making it safe to work with.

Ideal for practical investigations into antibiotic efficacy.

E.coli K12 (NCTC 10538) is Lactose positive (Lac+), i.e. produces beta-galactosidease in the presence of lactase.

ACDP Hazard Group 1

All Darwin's bacteria are derived from strains held by the British National Culture Collection (NCTC). These cultures are then sub-cultured before being applied to slopes and sold into schools and colleges across the UK. By sub-culturing we are able to supply quality bacteria at affordable prices. Our bacteria is a maximum of 4 passages away from the Culture Collection’s original. If you require fewer passages, or are purchasing for non-educational purposes, please purchase directly from the NCTC.

Made by Darwin Biological in the UK under licence from the UK Health Security Agency, formerly Public Health England. NCTC is the trade mark of UKHSA.

Culture is supplied on a nutrient agar slope in a glass screw top universal bottle. Store in a fridge (2-8°C), bring to room temperature prior to use. Culture around 25°C.

Click here for a downloadable information sheet.

Please note: All bacteria are sold at customer's own risk and appropriate risk assessments must be completed under COSHH before proceeding, considering both the ACDP and COSHH regulations, but also considering the risk to young people as a susceptible group. No responsibility will be taken for any accidents resulting from misuse. Cultures are non-returnable. For UK educational purposes only. Not for human consumption. 

Customer Reviews

Based on 8 reviews
Efficient delivery and great product.

Product was ordered on a Thursday and with me by the following Tuesday morning. Worked well for the A-Level antimicrobial resistance practical. Would definitely recommend to others for this practical.

Antibiotic resistance practical

These worked perfectly as part of the GCSE antibiotic resistance practical.


Very pleased with service. Prompt delivery and easy-to-use website. Will use again in future.

Sonia p
Excellent service

Placed the K12 E.coli order and it arrived the next day just on time for the Microbiology practical
Thank you ever so much - would recommend using again in the future

Lesley Thompson
E Coli

Good strong culture which arrived promptly