| 摘要 |
The invention provides methods for the purification of polyribosyl ribitol phosphate (PRP) from Haemophilus influenzae type b cultures, as well as novel forms of immunologically active PRP obtainable by such methods and combined vaccines containing immunologically active PRP and Bordetella pertussis antigens. The purification methods involve removing contaminants to a low level by treating the PRP in the form of a hexadecyltrimethyl ammonium bromide complex with a calcium phosphate adsorbent (hydroxylapatite) in a phosphate buffer, and may be practiced either as a batch process or as a column process. The purified PRP thus obtainable is immunologically active and may be used with B. pertussis antigens to form a combined vaccine which elicits anti-PRP antibody and antipercussis antibody formations in young animals. This sera with anti-PRP antibody exhibits a strong bactericidal activity. |
