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Streptococcus Antisera for Precipitation

Confirmation of streptococci is important prior to serotyping.

Product description

Streptococcus antisera are polyclonal antibodies produced by immunising rabbits.

Our Streptococcus antisera are manufactured free of cross-reactions with known strains in vials with 1 mL ready-to-use antiserum. This is sufficient for a minimum of 50 reactions.

Streptococcus antisera for serotyping of streptococci

High quality

We offer experienced technical support

Shelf-life of 4 years

How to use

Streptococcus antisera are used for precipitation of Lancefield extracts in a capillary tube.

Equal quantities of antiserum and extract are drawn up into a capillary tube – the serum uppermost, as the serum must diffuse down through the extract, and a precipitate is visualized for a positive reaction.

Product range

SSI Diagnostica offers antisera to identify the 10 B types and the 5 S. suis types.

Group B type antisera

Product Number
of tests 
22455 Type Ia 50 1 mL vial
22456 Type Ib 50 1 mL vial
22458 Type II 50 1 mL vial
22459 Type III 50 1 mL vial
22460 Type IV 50 1 mL vial
22461 Type V 50 1 mL vial
22462 Type VI 50 1 mL vial
29269 Type VII 50 1 mL vial
44627 Type VIII 50 1 mL vial
69746 Type IX 50 1 mL vial

S. suis type antisera

Product Number
of tests 
22280 Type 1 50 1 mL vial
22282 Type 2 50 1 mL vial
22292 Type 7 50 1 mL vial
22297 Type 9 50 1 mL vial
22303 Type 14 50 1 mL vial


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.


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