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Immulex Streptococcus

Confirmation of streptococci is important prior to serotyping.

Product description

All SSI Diagnostica latex products are labelled ImmuLex™ (Immunology and Latex). A contraction of Immunology and Latex. Streptococcus antisera for latex are polyclonal antibodies produced by immunising rabbits with killed cells. The serum is then coupled to latex particles.

Our Streptococcus sera for latex testing are manufactured free of cross-reactions with known strains in vials with 1.5 mL ready-to-use antiserum. This is sufficient for a minimum of 75 reactions.

Streptococcus antisera for serotyping of streptococci

High quality

We offer experienced technical support

Shelf-life of 4 years

How to use

ImmuLex™ Streptococcus products are used for serotyping based on agglutination.

Equal quantities of latex reagent and bacterial culture are mixed on a white card, which is tipped back and forth. The reaction must be read within 30 seconds.

Product range

Group B antisera

Product Number
of tests
54982 ImmuLexTM type Ia 75 1.5 mL vial
54983 ImmuLexTM type Ib 75 1.5 mL vial
54984 ImmuLexTM type II 75 1.5 mL vial
54985 ImmuLexTM type III 75 1.5 mL vial
54986 ImmuLexTM type IV 75 1.5 mL vial
54987ImmuLexTM type V751.5 mL vial
54988ImmuLexTM type VI751.5 mL vial
54989ImmuLexTM type VII751.5 mL vial
54990ImmuLexTM type VIII751.5 mL vial
69745ImmuLexTM type IX751.5 mL vial


Product Number
of tests 
54991 ImmuLexTM Strep-B kit 10 x 75 1 box 
53285 Reaction cards 200 pcs600 1 box 
88464 Reaction cards 50 pcs 150 1 box 


Click the question to get your answer

Antibodies can be frozen, but the process of freezing and thawing is damaging for the antibodies, and the titer will drop (even though not dramatically) due to decomposition. We have not made further studies on this, and cannot guarantee the stability of the sera, but we have experienced that mostly the titer stays at the same level if a serum only is frozen and thawn once.

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.

You can always send an inquiry. We might have it. 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 serum.


B. Afshar, K. Broughton, R. Creti, A. Decheva, M. Hufnagel, P. Kriz, L. Lambertsen, M. Lovgren, P. Melin, G. Orefici, C. Poyart, A. Radtke, J. Rodriguez-Granger, U. B. Skov Sørensen, J. Telform, L. Valinsky, L. Zachariadou, members of the DEVANI study group, and A. Efstratiou. International External Quality Assurance for Laboratory Identification and Typing of Streptococcus agalactiae (Group B Streptococci). Journal of Clinical Microbiology, Apr. 2011, p. 1475-1482.


Please find the available downloads here.


Click on the link below to download the IFU.

Immulex Streptococcus


Please, reach out if you have questions, comments or requests.