Evidence map›Paper›PMID 15502871›Full record

ArticlePLoS biology2004

Genetic analysis of lice supports direct contact between modern and archaic humans.

David L Reed, Vincent S Smith, Shaless L Hammond, Alan R Rogers, Dale H Clayton

Abstract read
In one paragraph

Article in PLoS biology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 87 papers.

0numbers the graph read from it
0cells of the map it votes in
87citing papers in PubMed
–field-weighted citation impact
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

87 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. Genotyping specimens of human lice from a centenary entomological collection.Current research in parasitology & vector-borne diseases · 2025
    Article
  7. Article
  8. Article
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  12. Article
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  15. Article
  16. Article
  17. High Genetic Diversity andFrontiers in cellular and infection microbiology · 2022
    Article
  18. Article
  19. Article
  20. Article

27 more citing papers are in PubMed but not listed here.

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

5 authors.

David L ReedFlorida Museum of Natural History, Dickinson Hall, University of Florida, Gainesville, Florida, USA. dreed@flmnh.ufl.edu
Vincent S Smith
Shaless L Hammond
Alan R Rogers
Dale H Clayton

Funding

Wellcome Trust
6 · The paper itself

Abstract

Parasites can be used as unique markers to investigate host evolutionary history, independent of host data. Here we show that modern human head lice, Pediculus humanus, are composed of two ancient lineages, whose origin predates modern Homo sapiens by an order of magnitude (ca. 1.18 million years). One of the two louse lineages has a worldwide distribution and appears to have undergone a population bottleneck ca. 100,000 years ago along with its modern H. sapiens host. Phylogenetic and population genetic data suggest that the other lineage, found only in the New World, has remained isolated from the worldwide lineage for the last 1.18 million years. The ancient divergence between these two lice is contemporaneous with splits among early species of Homo, and cospeciation analyses suggest that the two louse lineages codiverged with a now extinct species of Homo and the lineage leading to modern H. sapiens. If these lice indeed codiverged with their hosts ca. 1.18 million years ago, then a recent host switch from an archaic species of Homo to modern H. sapiens is required to explain the occurrence of both lineages on modern H. sapiens. Such a host switch would require direct physical contact between modern and archaic forms of Homo.

Indexed as

AnimalsBiological EvolutionEvolution, MolecularFossilsGeographyHominidaeHost-Parasite InteractionsHumansLice InfestationsMolecular Sequence DataPaleontologyPediculusPhylogenyPolymorphism, GeneticPopulation DynamicsScalp

Identifiers

PMID15502871
PMCPMC521174

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.