Q: Is it possible to buy products in other antisera volumes than stated in the catalogue?
A: No, not unless you order large amounts. Please send an inquiry to .
Q: Is it possible to reserve antisera from a particular lot?
A: Yes, it is possible if you place an order in advance with the expected total volume for the period. In return we guarantee to keep the reserved lot for you.
Q: Can I order products that do not appear in the catalogue?
A: Please send an inquiry. Depending on the needed volume, we might be able to develop the requested product. It can be anything from a new pool composition to a new antiserum.
Q: Can I buy reference strains at Statens Serum Institut?
A: Yes, you can buy all reference strains for the O, H and K antigens. We also have a database containing more than 62,000 wild type strains, which you can also buy.
Q: Can you use smaller amounts of serum/latex/phag suspension than stated in the product insert?
A: We recommend that you use the volume stated in the product insert. It is particularly important to note that if the dilution of the antiserum is too high it will not catch the weakest reactions. Further, you will experience a weak agglutination.
Q: Can I get training in the use of antisera from SSI?
We offer a yearly training course. Contact us for more information.
Q: What is the difference between reference strains, test strains and wild type strains?
A: A reference strain is a microorganism defined to at least the genus and species level, catalogued and described according to its characteristics e.g. O, K and H serotype and stating its origin.
A test strain is generally used for quality control and performance testing of culture media or serving as a positive/negative control in a diagnostic kit ensuring that the performance of the test has been successful.
Wild type strains are isolates from patients, animals or other sources, and these are not well defined.
Q: Do we have an O157: H7 antisera?
A: SSI has an E. coli O157 antisera (article no. 45896) for O serotyping. To serotype the flagella use H7 single antisera (article no. 54406). To have an O157:H7 antiserum is not possible, as you would get a positive reaction for all O serotypes having an H7, and also with all H serotypes having an O157.
Q: How long time does a serotyping at SSI take?
A: It can usually be done within three weeks.
Q: How should a strain be sent?
A: You should send the strain according to your national legislation. The strain should be transported in an ordinary transport medium (Stuarts, Cary Blair, lyophilised or likewise), and the package should be marked with an UN number corresponding to the content of the package.
Q: If we would like to have a strain typed, where should we send it?
A: You should send the strain to the below address:
Statens Serum Institut
Att.: Susanne Jespersen
Building 37K/Room 125c
2300 Copenhagen S
Before sending the strain, please notify
Q: What are the benefits of antisera from SSI?
A: The main advantages are:
1. We offer the full range of antisera for E. coli serotyping.
2. Reaction time for OK O antisera is only 10 seconds reducing the risk of false positive reactions leading to a more accurate result compared to other tests having a reaction time of 1 minute.
3. SSI antisera are absorbed and thus very specific.
4. We offer technical expertise and assistance / training.