ArticlePloS one2012
Pre-vaccination nasopharyngeal pneumococcal carriage in a Nigerian population: epidemiology and population biology.
Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 55 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
55 citing papers in PubMed, 3 syntheses or guidelines pooled it, 96 citations in OpenAlex.
- Upper airways colonisation of Streptococcus pneumoniae in adults aged 60 years and older: A systematic review of prevalence and individual participant data meta-analysis of risk factors.The Journal of infection · 2020Pooled it
- Pooled it
- Pooled it
- Weekly azithromycin for 48 weeks impacts nasopharyngeal microbial prevalence and Streptococcus pneumoniae serotypes in children with HIV-associated chronic lung disease.Scientific reports · 2025Trial
- Symptoms associated with influenza vaccination and experimental human pneumococcal colonisation of the nasopharynx.Vaccine · 2020Trial
- Trial
- Effect of early measles vaccine on pneumococcal colonization: A randomized trial from Guinea-Bissau.PloS one · 2017Trial
- Nasopharyngeal Pneumococcal Serotypes Before and After Mass Azithromycin Distributions for Trachoma.Journal of the Pediatric Infectious Diseases Society · 2016Trial
- Prevalence, Antimicrobial Resistance, and Genetic Diversity of Non-TypeableHealth science reports · 2026Review
- Host-Driven Genetic Diversity ofTransboundary and emerging diseases · 2026Article
- Serotype distribution and antimicrobial susceptibility patterns of Streptococcus pneumoniae isolates in the post-pneumococcal conjugate vaccine era in Nigeria: a hospital-based cross-sectional study.BMC infectious diseases · 2025Article
- Association of meteorological factors with childhood pneumonia incidence in Central Gondar Zone, Northwest Ethiopia: a time-series study (2013-2022).Italian journal of pediatrics · 2025Article
- Characterization of bacterial and viral pathogens in the respiratory tract of children with HIV-associated chronic lung disease: a case-control study.BMC infectious diseases · 2024Article
- Article
- Pneumococcal nasopharyngeal carriage in children under 5 years of age at an outpatient healthcare facility in Novi Sad, Serbia during the COVID-19 pandemic.IJID regions · 2022Article
- Molecular Epidemiology of Multidrug-Resistant Pneumococci among Ghanaian Children under Five Years Post PCV13 Using MLST.Microorganisms · 2022Article
- Association between household air pollution and nasopharyngeal pneumococcal carriage in Malawian infants (MSCAPE): a nested, prospective, observational study.The Lancet. Global health · 2022Observational
- Factors associated with pneumococcal nasopharyngeal carriage: A systematic review.PLOS global public health · 2022Article
- Nasopharyngeal Carriage of Streptococcus pneumoniae Among Young Children in Haiti Before Pneumococcal Conjugate Vaccine Introduction.The Journal of infectious diseases · 2021Article
- Pneumococcal Competition Modulates Antibiotic Resistance in the Pre-Vaccination Era: A Modelling Study.Vaccines · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 2 institutions in 2 countries.
Funding
Abstract
backgroundIntroduction of pneumococcal vaccines in Nigeria is a priority as part of the Accelerated Vaccine Introduction Initiative (AVI) of the Global Alliance for Vaccines and Immunisation (GAVI). However, country data on the burden of pneumococcal disease (IPD) is limited and coverage by available conjugate vaccines is unknown. This study was carried out to describe the pre vaccination epidemiology and population biology of pneumococcal carriage in Nigeria.
methodsThis was a cross sectional survey. Nasopharyngeal swabs (NPS) were obtained from a population sample in 14 contiguous peri-urban Nigerian communities. Data on demographic characteristics and risk factor for carriage were obtained from all study participants. Pneumococci isolated from NPS were characterised by serotyping, antimicrobial susceptibility and Multi Locus Sequencing Typing (MLST).
resultsThe prevalence of pneumococcal carriage was 52.5%. Carriage was higher in children compared to adults (67.4% vs. 26%), highest (≈90%) in infants aged <9 months and reduced significantly with increasing age (P<0.001). Serotypes 19F (18.6%) and 6A (14.4%) were most predominant. Potential vaccine coverage was 43.8%, 45.0% and 62% for PCV-7, PCV-10 and PCV-13 respectively. There were 16 novel alleles, 72 different sequence types (STs) from the isolates and 3 Sequence Types (280, 310 and 5543) were associated with isolates of more than one serotype indicative of serotype switching. Antimicrobial resistance was high for cotrimoxazole (93%) and tetracycline (84%), a third of isolates had intermediate resistance to penicillin. Young age was the only risk factor significantly associated with carriage.
conclusionsPneumococcal carriage and serotype diversity is highly prevalent in Nigeria especially in infants. Based on the coverage of serotypes in this study, PCV-13 is the obvious choice to reduce disease burden and prevalence of drug resistant pneumococci. However, its use will require careful monitoring. Our findings provide sound baseline data for impact assessment following vaccine introduction in Nigeria.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.