QC Strains

NCIMB supplies a range of quality control (QC) strains with guaranteed traceability in three easy-to-use formats: glass ampoules, screw top vials and MicroSnapTM.

Our QC range includes Candida albicans, Aspergillus brassiliensis and Saccharomyces cerevisiae in addition to 29 commonly required bacterial strains. All of NCIMB’s QC strains are certified first generation reference strains produced to ISO 9001:2015 standards. 

As curators of the UK’s National Collection of Industrial Food and Marine Bacteria, we can guarantee traceability, and provide strains equivalent to other culture collections where available.  By using first generation strains in our QC products, we minimise the risk of genetic drift, and help our customers to work to the highest quality control standards.

QC strain formats

Ampoules and vials

NCIMB’s glass ampoule and screw top vial QC products contain a strip of filter paper impregnated with freeze dried culture, giving a convenient format for single use procedures such as quality assurance testing of culture media.

Once the ampoule or vial has been opened, the strip can be dropped directly into or onto the appropriate medium, reducing risk of contamination. There are no expert handling requirements for this format and shelf life is considerably longer than for vacuum packaged gelatine-based products.


A selected range of our QC strains is also available in the MicroSnap format. This all plastic device is comprised of a lower chamber containing freeze dried culture and an upper chamber with resuscitation fluid and a swab. When activated by a simple snapping motion, the resuscitation fluid enters the lower chamber.  The integral swab can be used immediately after mixing to inoculate growth media.

Custom preservation

Our contract freeze drying service is available for preservation of customer strains, such as isolates obtained from environmental monitoring programmes.

All strains listed are available as screw-top bottles or glass ampoules.  MicroSnap is available as indicated below.

All strains and formats are available as packs of five for £80 plus postage and packaging costs.

  Strain Equivalent codes Available as MicroSnap
50097 Aspergillus brasiliensis
 (formerly Aspergillus niger)
16404 yes
50014 Bacillus cereus 8012 11778 10320 yes
50090 Bacillus subtilis ss. spizizenii  8054 6633 10400 yes
50091 Campylobacter jejuni 11168
50010 Candida albicans 10231 3179 Yes
50099 Clostridium sporogenes 532 19404 532
50029 Enterobacter aerogenes 10102 13048 10006 yes
50030 Enterococcus faecalis 8260 8213 yes
50112 Enterococcus faecalis 13280 29212
50034 Escherichia coli 11943 11775 9001 yes
50109 Escherichia coli 12210 25922 12241
50139 Escherichia coli 0157
(VT negative; ACDP 2)
50125 Escherichia coli 8545 8739
50101 Lactobacillus acidophilus 8690 4356
50045 Lactobacillus rhamnosus 8010 7464 6375 yes
50054 Lactobacillus plantarum ss. plantarum 11974 14917
50002 Listeria monocytogenes 11994
50007 Listeria monocytogenes 35152 7973
50063 Micrococcus luteus 9278 4698 2665
50157 Proteus mirabilis 29906 11938
50067 Pseudomonas aeruginosa 13063 25668 10662 yes
50111 Pseudomonas aeruginosa 12469 27853
50126 Pseudomonas aeruginosa 8626 9027
50068 Pseudomonas fluorescens 9046 13525 10038
50105 Saccharomyces cerevisiae 7754
50160 Saccharomyces cerevisiae 9763 10716
50076 Salmonella typhimurium 13034
50134 Salmonella abony 6017
50080 Staphylococcus aureus ss. aureus 8625 6538P 7447 yes
50113 Staphylococcus aureus ss. aureus 12702 25923
50143 Staphylococcus aureus ss. aureus (MRSA) 33591
50082 Staphylococcus epidermidis 12721 14990 11047 yes
50110 Staphylococcus epidermidis 8853 12228

A wider range of NCIMB strains are available in quantitative and qualitative QC formats from Microbiologics, NCIMB’s only licensed derivatives partner.