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Temporal association of infant immunisation with pneumococcal conjugate vaccine on the ecology of Streptococcus pneumoniae, Haemophilus influenzae and Staphylococcus aureus nasopharyngeal colonisation in a rural South African community

Nzenze, S. A. (author)
Shiri, T. (author)
Nunes, M. C. (author)
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Klugman, K. P. (author)
Kahn, Kathleen (author)
Umeå universitet,Epidemiologi och global hälsa,MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa ; INDEPTH Network, Accra, Ghana
Twine, R. (author)
de Gouveia, L. (author)
von Gottberg, A. (author)
Madhi, S. A. (author)
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 (creator_code:org_t)
Elsevier, 2014
2014
English.
In: Vaccine. - : Elsevier. - 0264-410X .- 1873-2518. ; 32:42, s. 5520-5530
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Background: Immunisation of children with pneumococcal conjugate vaccines (PCV) may affect the bacterial-ecology of the nasopharynx, including colonisation by Streptococcus pneumoniae, Haemophilus influenzae and Staphylococcus aureus. The aim of this study was to evaluate the effect of infant PCVimmunisation on the nasopharyngeal ecology of these potentially pathogenic bacteria in a rural African setting. Methods: Two cross sectional surveys were undertaken from May to October in 2009 (Period-1) which coincided with the introduction of 7-valent PCV (PCV7) and in May-October 2011 (Period-2). Consenting household members, where there was a child <2 years of age in residence, had nasopharyngeal swabs undertaken for culture. Results: From Period-1 to Period-2 in children 0-2 years and 3-12 years, prevalence of overall S. pneumoniae colonisation decreased from 74.9% to 67.0% (p < 0.001) and H. influenzae declined among children 3-12 years (55.1-45.3%, p < 0.001) but not among those <2 years. The prevalence of S. aureus remained unchanged in all children. Competitive associations were found between S. pneumoniae and S. aureus and between H. influenzae and S. aureus among children. In individuals >12 years, the prevalence of colonisation decreased from 11.2% to 6.8%, 16.7% to 8.8% and 31.2% to 23.7% for S. pneumoniae, H. influenzae and S. aureus, respectively; p < 0.001 for all comparions. Synergistic relationships for S. aureus with H. influenzae and S. pneumoniae were observed in both periods among this group.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Immunologi inom det medicinska området (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Immunology in the medical area (hsv//eng)

Keyword

infant immunisation
pneumococcal conjugate vaccine
Streptococcus pneumoniae
Haemophilus influenzae
Staphylococcus aureus
nasopharyngeal colonisation

Publication and Content Type

ref (subject category)
art (subject category)

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