R2A agar

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R2A agar (Reasoner's 2A agar) is a culture medium [1] developed to study bacteria which normally inhabit potable water. [2] These bacteria tend to be slow-growing species and would quickly be suppressed by faster-growing species on a richer culture medium. [3]

Since its development in 1985, [3] it has been found to allow the culturing of many other bacteria that will not readily grow on fuller, complex organic media.[ citation needed ]

Typical composition (% w/v)

Final pH 7.2 ± 0.2 @ 25 °C

References

  1. ↑ van der Linde K, Lim BT, Rondeel JM, Antonissen LP, de Jong GM (October 1999). "Improved bacteriological surveillance of haemodialysis fluids: a comparison between Tryptic soy agar and Reasoner's 2A media". Nephrol. Dial. Transplant. 14 (10): 2433–7. doi: 10.1093/ndt/14.10.2433 . PMID   10528669.
  2. ↑ Sandle, T. (July 2004). "An approach for the reporting of microbiological results from water systems". PDA J Pharm Sci Technol . 58 (4): 231–7. PMID   15368993.
  3. 1 2 Reasoner DJ, EE Geldreich EE (Jan 1985). "A new medium for the enumeration and subculture of bacteria from potable water". Appl. Environ. Microbiol. 49 (1): 1–7. Bibcode:1985ApEnM..49....1R. doi:10.1128/aem.49.1.1-7.1985. PMC   238333 . PMID   3883894.
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