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Haemophilus influenzae type b polysaccharide conjugate protein complex (Hib conjugate vaccine)

Target: Hib conjugate vaccine
Molecular classification: Polysaccharide-protein conjugate, Vaccine

Overview

The Haemophilus influenzae type b (Hib) polysaccharide conjugate protein complex is the active component in Hib vaccines, which are designed to prevent invasive diseases caused by H. influenzae type b, such as meningitis, pneumonia, epiglottitis, and septic arthritis. The vaccine works by inducing an immune response against the bacterium's capsular polysaccharide (PRP), conjugated to a carrier protein (Tetanus toxoid, Diphtheria toxoid/CRM197 mutant, or N. meningitidis OMP) to enhance immunogenicity.

Other names: Hib vaccinePRP conjugate vaccinePolyribosylribitol phosphate conjugate vaccinePRP-DHbOCPRP-OMPPRP-T

Mechanism of action

Induces production of antibodies against the PRP capsule of Hib bacteria, promoting opsonization and complement-mediated killing of the pathogen.

Biological functions

Induction of humoral immune responseOpsonizationComplement activationPrevention of Haemophilus influenzae type b infection

Disease associations

InfectionMeningitisPneumoniaEpiglottitisSeptic arthritis

Safety considerations

Common side effects: pain, swelling, or redness at the injection site, feverRare side effects: allergic reactions

Interacting drugs

None (vaccine)

Biomarkers

Anti-PRP antibody concentration (>= 0.15 mcg/mL)

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