Evidence map›Paper›PMID 21463979›Full record

ArticleEnvironmental health perspectives2011

The fungicide chlorothalonil is nonlinearly associated with corticosterone levels, immunity, and mortality in amphibians.

Taegan A McMahon, Neal T Halstead, Steve Johnson, Thomas R Raffel, John M Romansic, Patrick W Crumrine, Raoul K Boughton, Lynn B Martin, Jason R Rohr

Open access · diamondAbstract read
In one paragraph

Article in Environmental health perspectives, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
5.8field-weighted citation impact, top 4% 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

28 citing papers in PubMed, 112 citations in OpenAlex.

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  8. Fungicides: An Overlooked Pesticide Class?Environmental science & technology · 2019
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  10. A pesticide paradox: fungicides indirectly increase fungal infections.Ecological applications : a publication of the Ecological Society of America · 2017
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  14. Transforming ecosystems: When, where, and how to restore contaminated sites.Integrated environmental assessment and management · 2016
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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

9 authors at 4 institutions in 1 country.

Taegan A McMahonDepartment of Integrative Biology, University of South Florida, Tampa, Florida 33620, USA. tamcmaho@mail.usf.edu
Neal T Halstead
Steve Johnson
Thomas R Raffel
John M Romansic
Patrick W Crumrine
Raoul K Boughton
Lynn B Martin
Jason R Rohr
University of South Florida · USArchbold Biological Station · USRowan University · USUniversity of Florida · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundContaminants have been implicated in declines of amphibians, a taxon with vital systems similar to those of humans. However, many chemicals have not been thoroughly tested on amphibians or do not directly kill them.

objectiveOur goal in this study was to quantify amphibian responses to chlorothalonil, the most commonly used synthetic fungicide in the United States.

methodsWe reared Rana sphenocephala (southern leopard frog) and Osteopilus septentrionalis (Cuban treefrog) in outdoor mesocosms with or without 1 time (1×) and 2 times (2×) the expected environmental concentration (EEC) of chlorothalonil (~ 164 μg/L). We also conducted two dose-response experiments on O. septentrionalis, Hyla squirella (squirrel treefrog), Hyla cinerea (green treefrog), and R. sphenocephala and evaluated the effects of chlorothalonil on the stress hormone corticosterone.

resultsFor both species in the mesocosm experiment, the 1× and 2× EEC treatments were associated with > 87% and 100% mortality, respectively. In the laboratory experiments, the approximate EEC caused 100% mortality of all species within 24 hr; 82 μg/L killed 100% of R. sphenocephala, and 0.0164 μg/L caused significant tadpole mortality of R. sphenocephala and H. cinerea. Three species showed a nonmonotonic dose response, with low and high concentrations causing significantly greater mortality than did intermediate concentrations or control treatments. For O. septentrionalis, corticosterone exhibited a similar nonmonotonic dose response and chlorothalonil concentration was inversely associated with liver tissue and immune cell densities (< 16.4 μg/L).

conclusionsChlorothalonil killed nearly every amphibian at the approximate EEC; at concentrations to which humans are commonly exposed, it increased mortality and was associated with elevated corticosterone levels and changes in immune cells. Future studies should directly quantify the effects of chlorothalonil on amphibian populations and human health.

Indexed as

AmphibiansAnimalsCorticosteroneFungicides, IndustrialImmunityLiverMortalityNitrilesRana pipiensRanidaeWater Pollutants, ChemicalCorticosteroneFungicides, IndustrialNitrilestetrachloroisophthalonitrileWater Pollutants, Chemical

Identifiers

PMID21463979
PMCPMC3237349
OpenAlexW2009959372

What OpenQuestion holds

Textmetadata
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Read underepoch 390

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.