Recognizes types 3, 4, 6, 7, 9, 14, 18, 19 and 23 surface antigens of S. pneumoniae. Antiserum is not absorbed and may react with related microorganisms.

Short-term (up to 6 months) store at 2-8°C. Long term, aliquot and store at -20 °C. Avoid multiple freeze/thaw cycles.