Evidence map›Paper›PMID 19158267›Full record

ArticleJournal of clinical microbiology2009

Changes in genetic diversity of the Bordetella pertussis population in the United Kingdom between 1920 and 2006 reflect vaccination coverage and emergence of a single dominant clonal type.

David J Litt, Shona E Neal, Norman K Fry

Open access · bronzeAbstract read
In one paragraph

Article in Journal of clinical microbiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
6.5field-weighted citation impact, top 3% of its field
1 · What the graph read from 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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

38 citing papers in PubMed, 78 citations in OpenAlex.

  1. Trial
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  4. Genotypes ofZhejiang da xue xue bao. Yi xue ban = Journal of Zhejiang University. Medical sciences · 2022
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  13. Direct molecular typing of Bordetella pertussis from nasopharyngeal specimens in China in 2012-2013.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2016
    Article
  14. Review
  15. Analysis of Bordetella pertussis clinical isolates circulating in European countries during the period 1998-2012.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2015
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

David J LittRespiratory and Systemic Infection Laboratory, Health Protection Agency Centre for Infections, 61 Colindale Avenue, London NW9 5EQ, United Kingdom. david.litt@hpa.org.uk
Shona E Neal
Norman K Fry

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Pertussis (whooping cough) is a potentially fatal respiratory disease caused by the bacterium Bordetella pertussis. Despite effective vaccination programs, there has been concern in some developed countries that pertussis cases are on the increase. We characterized 703 clinical B. pertussis isolates collected in the United Kingdom between 1920 and 2006 using multilocus variable-number tandem repeat analysis (MLVA), pertactin (prnA) and pertussis toxin (ptxA) genotyping, and serotyping. The results showed that the genetic diversity of the bacterial population decreased during periods of high vaccine coverage. However, it was elevated between 1977 and 1986, when vaccine coverage in the United Kingdom was low and epidemics occurred. A high proportion of MLVA types during this epidemic period were novel, and the prnA(2) and prnA(3) alleles were seen for the first time in the United Kingdom. MLVA-27 appeared in 1982, was codominant during the 1998-to-2001 period, and comprised approximately 70% of isolates during both the 2002-to-2004 and the 2005-to-2006 periods. The United Kingdom is dominated currently by an MLVA-27 prnA(2) ptxA(1) serotype Fim3 clonal type. Even during recent periods dominated by MLVA-27, many novel types were found at low frequencies, suggesting that either there are a large number of uncommon MLVA types circulating at low frequencies or new types are constantly arising. This supports a hypothesis that MLVA-27 is under some form of positive selection conferring increased survival in a highly vaccinated population. There has been no significant change to the bacterial population in the first 2 years since the United Kingdom switched from a whole-cell to an acellular vaccine.

Indexed as

Genetic VariationBacterial Typing TechniquesBordetella pertussisChild, PreschoolCluster AnalysisDNA, BacterialDNA FingerprintingGenotypeHumansInfantMolecular EpidemiologyPertussis VaccineRepetitive Sequences, Nucleic AcidSequence Analysis, DNAUnited KingdomVirulence FactorsDNA, BacterialPertussis VaccineVirulence Factors

Identifiers

PMID19158267
PMCPMC2650949
OpenAlexW2156129382

What OpenQuestion holds

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Registered trials

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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.