TABLE 3.

Comparison of the relative toxicities of glycolic acid to 21 strains (belonging to 19 species) of acidophilic microorganisms

Maximum glycolic acid concn permitting growth (mM)	Acidophile strains
0.1	L. ferriphilum type strain, At. ferrivorans type strain
0.5	L. ferrooxidans type strain, At. caldus type strain
1.0	“L. ferrodiazotrophum” UBA1, Am. ferrooxidans type strain, S. thermosulfidooxidans type strain, S. thermosulfidooxidans TH1, S. acidophilus ALV, S. acidophilus YTF1, S. benefaciens type strain, S. thermotolerans L15, Firmicutes strain G1, Ferrimicrobium acidiphilum type strain, Firmicutes strain SLC1
2.5	At. ferrooxidans type strain, At. thiooxidans type strain, Acidiphilium SJH
5.0	Acidocella PFBC, Ab. capsulatum, Fp. acidiphilum BRGM4