A modified medium was developed in which very finely divided calcium hydroxy phosphate and bromcresol purple were used as the indicator for the presence of acid-producing colonies on agar plates. The medium allows enumeration of acidogenic bacteria in no more than 72 hours; the results are highly reproducible.
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References
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Handelman, S.L. ; Mills, J.R.; and Mecgo, L.: A Medium for Differentiating Acidogenic Bacteria , Arch Oral Biol13: 1187-1196, 1968 .
2.
Katznelson, H.J.; Peterson, E.A.; and Rouatt, J.W.: Phosphate Dissolving Microorganisms on Seed and in the Root Zone of Plants, Can J Bot40: 1181-1186, 1962.
