Streptococcus Pneumoniae Type 8 Capsular Polysaccharide Antigen
Streptococcus pneumoniae type 8 capsular polysaccharide antigen is an immunological component derived from the polysaccharide capsule of Streptococcus pneumoniae serotype 8. It is used as a component in pneumococcal vaccines to stimulate protective immune responses against pneumococcal infections caused by this serotype. This antigen is primarily utilized in vaccine formulations for individuals at increased risk of pneumococcal disease.
A vaccine antigen component that helps protect against pneumococcal infections caused by S. pneumoniae type 8.
Key facts at a glance
- RxNorm
- 854970
- Generic
- Streptococcus Pneumoniae Type 8 Capsular Polysaccharide Antigen
- Class
- unclassified
- Brands
- Pneumovax 23
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- prefilled syringe, injection, solution
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Used as a component in pneumococcal polysaccharide or conjugate vaccines for prevention of invasive pneumococcal disease, pneumonia, and otitis media caused by Streptococcus pneumoniae serotype 8. Particularly relevant for adults over 65, young children, and individuals with immunocompromising conditions.
The capsular polysaccharide antigen stimulates the immune system to produce type-specific antibodies that recognize and neutralize Streptococcus pneumoniae bacteria expressing the type 8 capsule. When included in conjugate vaccines, the polysaccharide is conjugated to a carrier protein to enhance immunogenicity, particularly in young children.
This is a vaccine antigen component, not a standalone medication. Should not be administered to individuals with known hypersensitivity to vaccine components. May cause local injection site reactions or mild systemic symptoms. Vaccination schedules and eligibility should follow current public health guidelines. Type 8 is included in both PPSV23 and PCV13/PCV15/PCV20 vaccines.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 31, 2026. · Read our editorial policy