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Where To Buy Bacterial Strains
The National Collection of Type Cultures is one of four Culture Collections of the UK Health Security Agency. Founded in 1920, NCTC is the longest-established collection of its type anywhere in the world, and also serves as a United Nations Educational, Scientific and Cultural Organization (UNESCO) Microbial Resource Centre (MIRCEN).
where to buy bacterial strains
The NCTC collection, which is certified to ISO/IEC 17025:2017, supplies over 5500 type and reference bacterial strains - many of medical, scientific and veterinary importance worldwide. Our strains support academic, health, food and veterinary institutions and are used in microbiology laboratories in a range of different sectors and in research institutes worldwide. All are available in a freeze-dried (lyophilised) format.
The collection is of fundamental importance to the life science community and many of the strains are stipulated in internationally recognised standard methods as definitive control strains for various microbiological testing procedures. The strains are preserved as characterised, authenticated freeze-dried (lyophilised) cultures in fused-glass ampoules, which are stored mainly at 10C.
In addition, 150 strains are also available as Bacterial DNA. The DNA supplied (approximately 2µg) is high molecular weight and is therefore suitable for a wide range of molecular applications including whole genome sequencing.
ATCC is the premier source for microbial reference strains. Within our holdings are several ATCC special collections and projects representing critical areas of research. These collections include high-quality, fully authenticated certified reference materials, human microbiome specimens, US National Park Service cultures, and eumycetozoan strains. Our rich portfolio of high-quality materials will move your research forward.
Our bacterial strains are shipped as dangerous goods either as UN3373 or UN2814. The only strains we have that are shipped as UN2814 are E. coli strains. Please refer to the list of E.coli strains where strains shipped as UN2814 are marked with an asterisk (*). All other strains are sent according to UN 3373.
Dangerous goods cannot be shipped with other items. If you order antisera and bacterial strains in the same order, we need to ship these as two separate shipments, and therefore we will also charge for two shipments.
The bacterial strain E. coli O157 (cat. No. 82292) falls into the category about dual-use and is subject to export control from the Danish Business Authority. This concerns countries outside the EU except for Australia, Canada, Japan, New Zealand, Norway, Switzerland, and USA.Therefore we need to apply for export authorization in order to export this bacterial strain to certain countries. The end-user needs to fill in this form and return it to ivdorders@ssidiagnostica.com.
Some enteric bacterial strains cause acute outbreaks linked to specific sources. Other strains, referred to as reoccurring, emerging, or persisting (REP) strains, can reoccur and periodically cause acute outbreaks. They can also emerge and increase in frequency or persist and cause illnesses over periods of months or years, despite investigation and prevention efforts.
Investigators use a laboratory method called whole genome sequencing (WGS) to identify the DNA fingerprints of bacteria from ill people and from foods, animals, and the environment. These DNA fingerprints represent strains of bacteria.
WGS has also enabled investigators to find and investigate groups of illnesses that are caused by the same strain but that occur over time periods longer than an acute outbreak. These strains can reoccur and periodically cause acute outbreaks, emerge and increasingly cause illness, or persist and cause illnesses over periods of months or years. They may continue to cause illnesses despite investigation and prevention efforts.
Since 2019, CDC has used the PulseNet system to identify and monitor REP strains of several major pathogens, including Salmonella, E. coli O157:H7, Listeria, and Campylobacter. PulseNet uses a combination of different WGS tools for identifying and tracking these strains and will develop more as new strains are identified and investigated.
The secret to that taste, he says, is the bacteria that Bulgarian yogurt-makers have used for thousands of years. So when he flew to the U.S. in 1991, he brought with him, in his luggage, two jars of those precious bacterial cultures.
Many small yogurt companies tell stories of starting with bacterial cultures handed down from previous generations. "My uncle, a long time ago, got his own" yogurt-making cultures, says Hannibal Murray, operations manager of White Mountain Foods in Austin, Texas.
Curic-Bawden explains that there's lots of variation within these two bacterial species, just as there's immense variation within our species, Homo sapiens. Some of these little creatures gobble up lactose faster than others; some release more of that sour, tangy flavor.
So her company, Christian Hansen, has assembled a kind of microscopic zoo: 60 different strains of yogurt-making bacteria. They were originally collected in the ancestral homelands of yogurt, including Greece, Turkey, Bulgaria, the Balkans and the Caucasus region. "We blend them in different ratios to achieve a certain texture and flavor," Curic-Bawden says.
Yogurt-makers with a particular vision for their yogurt make pilgrimages to Curic-Bawden's workplace, looking for the bacterial blend that's just right for them. "She's the doyenne of cultures," says Hilmarsson.
Deciding on that mix can be complicated. Douglas Stewart, co-founder of Smari Organics, which makes Icelandic-style yogurt, says his company had to adopt a different bacterial culture when the first version produced yogurt that the company's yogurt-straining equipment couldn't handle. "If we found something that worked better, we'd switch," Stewart wrote in an email.
It's possible to get your hands on yogurt-making cultures that, do, in fact, trace their lineage back to someone's kitchen. There's a community of culture-sharing yogurt enthusiasts, and a company called Cultures for Health sells various yogurt starters, some of them labeled as Greek, Bulgarian and Finnish. But Julie Feickert, the company's founder, says she acquired these bacterial cultures from "people I know": fellow yogurt-makers near Portland, Ore., where she started the company, and elsewhere in the U.S.
Curic-Bawden, for her part, believes that true "heirloom" yogurt cultures are now almost impossible to find. She says that most home yogurt cultures these days actually trace their ancestry to yogurt that someone bought in a store, which in turn came from the bacterial collections of companies like Christian Hansen.
Max McGloughlan, one of the chemists in charge of production at the company, shows me 8,000-gallon tanks where the bacteria multiply, and machines that concentrate the microbes into a thick soup. "After it is concentrated, we bring it over to our freezing area for pelletizing, and we make small droplets of frozen bacteria," he explains.
Four strains of tetrodotoxin-producing bacteria isolated from a red alga and from pufferfish were characterized. Two of these strains are members of the genus Listonella MacDonell and Colwell. The phenotypic characteristics, guanine-plus-cytosine contents, and base sequences of the 16S rRNAs of these organisms indicated that they are members of Listonella pelagia (Vibrio pelagius) biovar II. The other two strains are members of the genus Alteromonas Baumann et al. and the genus Shewanella MacDonell and Colwell. These two strains are mutually distinct and distinct from the previously described Alteromonas and Shewanella species and therefore are placed in new species. The names Shewanella alga and Alteromonas tetraodonis are proposed for these organisms; the type strains are strains OK-1 and GFC, respectively.
In previous years, it has been shown that human milk is a potential source of bacteria for the infant gut. The results of this work confirm the presence of the same specific bacterial strains of Bifidobacterium, Lactobacillus, and Staphylococcus in breast milk and infant fecal samples. The identity of bacteria isolated from breast milk and infant feces from 20 mother-infant pairs was investigated at the strain level. DNA from Staphylococcus, Lactobacillus, and Bifidobacterium was detected by qRTi-PCR in nearly all samples analyzed. These samples were cultured on different agar media. One colony representative of each morphology was selected and identified at the species level combining classical tests and molecular techniques (PCR, RAPD, PFGE, and/or MLST genotyping). Breast milk and infant feces from 19 mother-infant pairs shared different Staphylococcus, Lactobacillus, and/or Bifidobacterium species and strains. Significantly, 2 mother-infant pairs shared 4 bacterial strains although most pairs shared 2. These results confirm that breast milk and infant feces from mother-infant pairs share the same strain(s), indicating that breastfeeding could contribute to the bacterial transfer from the mother to the infant and, therefore, to the infant gut colonization.
The host, microbial, and environmental factors that contribute to variation in tuberculosis (TB) disease are incompletely understood. Accumulating evidence suggests that one driver of geographic variation in TB disease is the local ecology of mycobacterial genotypes or strains, and there is a need for a comprehensive and systematic synthesis of these data. The objectives of this study were to (1) map the global distribution of genotypes that cause TB disease and (2) examine whether any epidemiologically relevant clinical characteristics were associated with those genotypes.
We performed a systematic review of PubMed and Scopus to create a comprehensive dataset of human TB molecular epidemiology studies that used representative sampling techniques. The methods were developed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). We extracted and synthesized data from studies that reported prevalence of bacterial genotypes and from studies that reported clinical characteristics associated with those genotypes. 041b061a72