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Table 1 Genotoxicity assays on glyphosate and formulated GBHs by registrants (“Reg.”) and in public literature (“Pub.”)

From: How did the US EPA and IARC reach diametrically opposed conclusions on the genotoxicity of glyphosate-based herbicides?

Assay type and compound tested Number of assays Number of positives Percent positive
Reg. Pub. Total Reg. Pub. Total Reg. (%) Pub. (%) Total (%)
Bacterial reverse mutation
 Glyphosate technical 23 4 27 0 0 0 0 0 0
 Formulated GBHs 28 3 31 0 1 1 0 33 3
In vitro and in vivo mammalian gene mutation
 Glyphosate technical 4 2 6 0 1 1 0 50 17
 Formulated GBHs 0 1 1 0 1 1 0 100 100
In vitro chromosomal aberration
 Glyphosate technical 4 5 9 0 3 3 0 60 33
 AMPA 0 1 1 0 1 1 0 100 100
 Formulated GBHs 0 2 2 0 1 1 0 50 50
In vitro micronuclei induction in mammals
 Glyphosate technical 0 6 6 0 4 4 0 67 67
In vivo chromosomal aberration
 Glyphosate technical 5 2 7 0 2 2 0 100 29
 Formulated GBHs 0 8 8 0 6 6 0 75 75
In vivo micronuclei induction in mammals
 Glyphosate technical 14 6 20 1 2 3 7 33 15
 AMPA 0 1 1 0 1 1 0 100 100
 Formulated GBHs 15 13 28 0 7 7 0 54 25
DNA damage
 Glyphosate technical 2 27 29 0 23 23 0 85 79
 AMPA 0 3 3 0 3 3 0 100 100
 Formulated GBHs 0 38 38 0 33 33 0 87 87
All assays
 Glyphosate technical 52 52 104 1 35 36 2 67 35
 AMPA 0 5 5 0 5 5 0 100 100
 Formulated GBHs 43 65 108 0 49 49 0 75 45
 All tested compounds 95 122 217 1 89 90 1 73 41
  1. 1. Table includes assays on glyphosate technical cited in EPA’s 2016 “Glyphosate Issue Paper: Evaluation of Carcinogenic Potential,” Sect. 5: Data Evaluation of Genetic Toxicity, Table 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, and 5.7. Assays on formulated GBHs considered by EPA come from Tables F.1, F.2, F.3, F.4 and F.5 in Appendix F: “Genotoxicity Studies with Glyphosate Based Formulations” [3]
  2. 2. Also included are additional assays on glyphosate technical, AMPA, and formulated GBHs from IARC Monograph 112 on the carcinogenicity of glyphosate [4] from Tables 4.1, 4.2, 4.3, 4.4, 4.5, or 4.6
  3. 3. Additional file 1: Tables S1–S7 list all assays in the core tables from EPA 2016 [3] and IARC 2017 [4] based on genotoxicity assay type