Abstract:
:We determined the immunogenicity of conjugated Haemophilus influenzae type b and pneumococcal vaccines by quantitative analysis of the antibody response in asplenic patients. To that end, we vaccinated 92 patients with a conjugated Hib vaccine and 54 received two doses of conjugated pneumococcal vaccine (PCV7), followed at six months by a plain polysaccharide pneumococcal vaccine (PPV23). Antibody concentrations were measured before and three weeks after vaccination. After one dose of pneumococcal conjugate vaccine, 46% of the patients reached the antibody threshold of ≥ 1.0 μg/mL for all 7 tested vaccine serotypes. This percentage rose to 54% after the second dose of PCV7 and did not increase further after PPV23. Over 90% of patients had antibody concentrations ≥ 1.0 μg/mL for at least 5 out of the 7 conjugated pneumococcal serotypes after 2 doses of PCV7. For serotypes, included in the PPV23 vaccine only, 25% (PPS3)-100% (PPS19A) of the patients reached antibody concentrations ≥ 1.0 μg/mL after one dose of PPV23. For Hib, 97% of the patients reached the threshold concentration of ≥ 1.0 μg/mL after one dose of vaccine. It can be concluded that the majority of asplenic patients had a sufficient response to conjugated vaccines against Streptococcus pneumoniae and Hib, reflected by a ≥ 1.0 μg/mL antibody response. Inclusion of conjugated pneumococcal polysaccharide vaccines might be of additional value in the vaccination schedule for asplenic patients because of their high immunogenicity.
journal_name
Vaccinejournal_title
Vaccineauthors
Meerveld-Eggink A,de Weerdt O,van Velzen-Blad H,Biesma DH,Rijkers GTdoi
10.1016/j.vaccine.2010.11.034subject
Has Abstractpub_date
2011-01-17 00:00:00pages
675-80issue
4eissn
0264-410Xissn
1873-2518pii
S0264-410X(10)01668-3journal_volume
29pub_type
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