Evidence map›Paper›PMID 28830993›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2017

Caterpillars lack a resident gut microbiome.

Tobin J Hammer, Daniel H Janzen, Winnie Hallwachs, Samuel P Jaffe, Noah Fierer

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 245 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
245citing papers in PubMed, 1 pooled it
41.8field-weighted citation impact, top 1% 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

245 citing papers in PubMed, 1 synthesis or guideline pooled it, 470 citations in OpenAlex.

  1. Pooled it
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  14. The effects of dietary iron supplementation on bacterial infections inbioRxiv : the preprint server for biology · 2026
    Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article

185 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 at 4 institutions in 1 country.

Tobin J HammerDepartment of Ecology and Evolutionary Biology, University of Colorado Boulder, Boulder, CO 80309; tobin.hammer@colorado.edu.
Daniel H JanzenDepartment of Biology, University of Pennsylvania, Philadelphia, PA 19104.
Winnie HallwachsDepartment of Biology, University of Pennsylvania, Philadelphia, PA 19104.
Samuel P JaffeThe Caterpillar Lab, Keene, NH 03431.
Noah FiererDepartment of Ecology and Evolutionary Biology, University of Colorado Boulder, Boulder, CO 80309.
University of Pennsylvania · USCaterpillar (United States) · USCooperative Institute for Research in Environmental Sciences · USUniversity of Colorado Boulder · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Many animals are inhabited by microbial symbionts that influence their hosts' development, physiology, ecological interactions, and evolutionary diversification. However, firm evidence for the existence and functional importance of resident microbiomes in larval Lepidoptera (caterpillars) is lacking, despite the fact that these insects are enormously diverse, major agricultural pests, and dominant herbivores in many ecosystems. Using 16S rRNA gene sequencing and quantitative PCR, we characterized the gut microbiomes of wild leaf-feeding caterpillars in the United States and Costa Rica, representing 124 species from 15 families. Compared with other insects and vertebrates assayed using the same methods, the microbes that we detected in caterpillar guts were unusually low-density and variable among individuals. Furthermore, the abundance and composition of leaf-associated microbes were reflected in the feces of caterpillars consuming the same plants. Thus, microbes ingested with food are present (although possibly dead or dormant) in the caterpillar gut, but host-specific, resident symbionts are largely absent. To test whether transient microbes might still contribute to feeding and development, we conducted an experiment on field-collected caterpillars of the model species

Indexed as

Gastrointestinal MicrobiomeAnimalsBiodiversityFood ChainFood MicrobiologyHerbivoryLarvaLepidopteraManducaPlant LeavesRNA, Ribosomal, 16SSymbiosisRNA, Ribosomal, 16SherbivoryinsectsLepidopteramutualismsymbiosis

Identifiers

PMID28830993
PMCPMC5594680
OpenAlexW2953381034

What OpenQuestion holds

Textmetadata
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.