Cited by 387Helminth infection and controlParasite Biology and Host InteractionsGenetic diversity and population structure

Host movement and the genetic structure of populations of parasitic nematodes.

Blouin, M S, Yowell, C A, Courtney, C H, Dame, J B·1995·Genetics

Abstract

Mitochondrial DNA (mtDNA) sequence data were used to compare the population genetic structures of five species of parasitic nematodes from three different hosts: Ostertagia ostertagi and Haemonchus placei from cattle, H. contortus and Teladorsagia circumcincta from sheep, and Mazamastrongylus odocoilei from white-tailed deer. The parasites of sheep and cattle showed a pattern consistent with high gene flow among populations. The parasite of deer showed a pattern of substantial population subdivision and isolation by distance. It appears that host movement is an important determinant of population genetic structure in these nematodes. High gene flow in the parasites of livestock also indicates great opportunity for the spread of rare alleles that confer resistance to anthelmintic drugs. All species, including the parasite of deer, had unusually high within-population diversities (averages of 0.019-0.027 substitutions per site between pairs of individuals from the same population). Large effective population sizes (Ne), perhaps in combination with rapid mtDNA evolution, appear to be the most likely explanation for these high within-population diversities.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1093/genetics/141.3.1007

Cites

30 of 30 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Parasitic strongylid nematodes have genetic features that favour development of anthelmintic resistance, including rapid nucleotide sequence evolution and large effective population sizes leading to high genetic diversity.

    “Parasitic strongylid nematodes have a number of genetic features, which favour the development of anthelmintic resistance, such as rapid rates of nucleotide sequence evolution and exceedingly large effective population sizes, leading to remarkably high levels of genetic diversity [21, 22].”

    From Multiple drug resistance in the canine hookworm Ancylostoma caninum: an emerging threat? (2019) · cites this paper as [21]

    The Discussion (p. 7) proposes large effective population size, perhaps combined with accelerated nucleotide substitution, as an explanation for the high diversity observed in trichostrongylids. It treats faster nucleotide evolution as a hypothesis, not an established feature. Its discussion of anthelmintic resistance (p. 7) links its spread to high gene flow, rather than showing that the proposed diversity mechanisms favour resistance development. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. UYENOYAMA, M. K., 1986 Pleiotropy and the evolution of genetic systems conferring resistance to pesticides, pp. 207–221 in Pesticide Resistance: Strātegies and Tactics for Management, edited by National Academy of Šciences. National Academy Press, Washington, D.C.

Cited by

Sorted by citations

Authors
Blouin, M. S., Yowell, C. A., Courtney, C. H., & Dame, J. B.
Affiliations
  • University of Florida (US)
  • Oregon State University (US)
Venue
Genetics
Published
1995-11-01
Volume
141
Issue
3
Pages
1007-1014
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2096870868
Cited by
387
References
30
Citations by year
2026: 12 · 2025: 14 · 2024: 11 · 2023: 8 · 2022: 9 · 2021: 12 · 2020: 14 · 2019: 11 · 2018: 15 · 2017: 15 · 2016: 23 · 2015: 19 · 2014: 17 · 2013: 21 · 2012: 15
FWCI
7.51
Type
journal article
Language
en
Open access
closed
Locations
  • Genetics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Veterinary › Small Animals › Helminth infection and control
  • Physical Sciences › Environmental Science › Ecology › Parasite Biology and Host Interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
Keywords
host movement, population structure, parasitic nematodes, mitochondrial DNA, gene flow, isolation by distance, population subdivision, Ostertagia ostertagi, Haemonchus contortus, Haemonchus placei, Teladorsagia circumcincta, anthelmintic resistance, effective population size, livestock parasites, deer parasites
MeSH terms
Alleles, Animals, Anthelmintics, Base Sequence, Cattle, Cattle Diseases, Deer, Demography, DNA, Mitochondrial, Drug Resistance, Gene Frequency, Genetics, Population, Haemonchiasis, Haemonchus, Host-Parasite Interactions, Molecular Sequence Data, Ostertagia, Ostertagiasis, Population Density, Sheep, Sheep Diseases, Trichostrongyloidea, Trichostrongyloidiasis, United States, Genetic Variation, Sequence Alignment, Evolution, Molecular

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review