Performance of Reasoner's 2 Agar (R2A) medium in enumeration of culturable microorganisms in water intended for human consumption
Kristiina Valkama, Anna Pursiainen, Olivier Molinier, Sunna Nikodemus, Eric Pierlot, Tarja Pitkänen
This study evaluates the R2A medium's performance for culturable microorganism enumeration in drinking water, recommending spread plate inoculation and 7-day incubation at 22°C.
bioRxiv · Feb 10, 2026 · PreprintMicrobiology