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Pneumococcal capsular polysaccharides conjugated to protein D for prevention of acute otitis media caused by both Streptococcus pneumoniae and non-typable Haemophilus influenzae: a randomised double-blind efficacy study
Prymula R, Peeters P, Chrobok V, Kriz P, Novakova E, Kaliskova E, Kohl I, Lommel P, Poolman J, Prieels JP, Schuerman L.
Jazyk angličtina Země Velká Británie
Typ dokumentu randomizované kontrolované studie
E-zdroje NLK Online
ProQuest Central od 1992-01-04 do Před 3 měsíciMedline Complete (EBSCOhost) od 1991-01-05 do 2006-12-24
Nursing & Allied Health Database (ProQuest) od 1992-01-04 do Před 3 měsíci
Health & Medicine (ProQuest) od 1992-01-04 do Před 3 měsíci
Family Health Database (ProQuest) od 1992-01-04 do Před 3 měsíci
Psychology Database (ProQuest) od 1992-01-04 do Před 3 měsíci
Health Management Database (ProQuest) od 1992-01-04 do Před 3 měsíci
Public Health Database (ProQuest) od 1992-01-04 do Před 3 měsíci
ScienceDirect (archiv) od 1993-01-01 do 2009-12-31
- MeSH
- akutní nemoc MeSH
- bakteriální polysacharidy imunologie MeSH
- bakteriální proteiny imunologie MeSH
- dvojitá slepá metoda MeSH
- financování organizované MeSH
- Haemophilus influenzae izolace a purifikace klasifikace patogenita MeSH
- imunoglobulin D MeSH
- kojenec MeSH
- lidé MeSH
- lipoproteiny imunologie MeSH
- otitis media s výpotkem mikrobiologie MeSH
- otitis media imunologie mikrobiologie prevence a kontrola MeSH
- pneumokokové vakcíny imunologie terapeutické užití MeSH
- sérotypizace MeSH
- Streptococcus pneumoniae izolace a purifikace klasifikace patogenita MeSH
- transportní proteiny imunologie MeSH
- vakcína proti hepatitidě A MeSH
- Check Tag
- kojenec MeSH
- lidé MeSH
- Publikační typ
- randomizované kontrolované studie MeSH
BACKGROUND: Acute otitis media is one of the most commonly-diagnosed childhood infections. This study assessed the efficacy of a novel vaccine that contained polysaccharides from 11 different Streptococcus pneumoniae serotypes each conjugated to Haemophilus influenzae-derived protein D in prevention of acute otitis media. METHODS: 4968 infants were randomly assigned to receive either pneumococcal protein D conjugate or hepatitis A vaccine at the ages of 3, 4, 5, and 12-15 months and were followed-up until the end of the second year of life. Middle-ear fluid was obtained for bacteriological culture and serotyping in children who presented with abnormal tympanic membrane or presence of middle-ear effusion, plus two predefined clinical symptoms. The primary endpoint was protective efficacy against the first episode of acute otitis media caused by vaccine pneumococcal serotypes. Analysis was per protocol. FINDINGS: From 2 weeks after the third dose to 24-27 months of age, 333 clinical episodes of acute otitis media were recorded in the protein D conjugate group (n=2455) and 499 in the control group (n=2452), giving a significant (33.6% [95% CI 20.8-44.3]) reduction in the overall incidence of acute otitis media. Vaccine efficacy was shown for episodes of acute otitis media caused by pneumococcal vaccine serotypes (52.6% [35.0-65.5] for the first episode and 57.6% [41.4-69.3] for any episode). Efficacy was also shown against episodes of acute otitis media caused by non-typable H influenzae (35.3% [1.8-57.4]). The vaccine reduced frequency of infection from vaccine-related cross-reactive pneumococcal serotypes by 65.5%, but did not significantly change the number of episodes caused by other non-vaccine serotypes. INTERPRETATION: These results confirm that using the H influenzae-derived protein D as a carrier protein for pneumococcal polysaccharides not only allowed protection against pneumococcal otitis, but also against acute otitis media due to non-typable H influenzae. Whether this approach would also allow improved protection against lower respiratory tract infections warrants further investigation.
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- $a Department of Epidemiology, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic. prymula@pmfhk.cz
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- $a BACKGROUND: Acute otitis media is one of the most commonly-diagnosed childhood infections. This study assessed the efficacy of a novel vaccine that contained polysaccharides from 11 different Streptococcus pneumoniae serotypes each conjugated to Haemophilus influenzae-derived protein D in prevention of acute otitis media. METHODS: 4968 infants were randomly assigned to receive either pneumococcal protein D conjugate or hepatitis A vaccine at the ages of 3, 4, 5, and 12-15 months and were followed-up until the end of the second year of life. Middle-ear fluid was obtained for bacteriological culture and serotyping in children who presented with abnormal tympanic membrane or presence of middle-ear effusion, plus two predefined clinical symptoms. The primary endpoint was protective efficacy against the first episode of acute otitis media caused by vaccine pneumococcal serotypes. Analysis was per protocol. FINDINGS: From 2 weeks after the third dose to 24-27 months of age, 333 clinical episodes of acute otitis media were recorded in the protein D conjugate group (n=2455) and 499 in the control group (n=2452), giving a significant (33.6% [95% CI 20.8-44.3]) reduction in the overall incidence of acute otitis media. Vaccine efficacy was shown for episodes of acute otitis media caused by pneumococcal vaccine serotypes (52.6% [35.0-65.5] for the first episode and 57.6% [41.4-69.3] for any episode). Efficacy was also shown against episodes of acute otitis media caused by non-typable H influenzae (35.3% [1.8-57.4]). The vaccine reduced frequency of infection from vaccine-related cross-reactive pneumococcal serotypes by 65.5%, but did not significantly change the number of episodes caused by other non-vaccine serotypes. INTERPRETATION: These results confirm that using the H influenzae-derived protein D as a carrier protein for pneumococcal polysaccharides not only allowed protection against pneumococcal otitis, but also against acute otitis media due to non-typable H influenzae. Whether this approach would also allow improved protection against lower respiratory tract infections warrants further investigation.
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