RT Journal Article SR Electronic(1) A1 Masover, Gerald K. A1 Catlin, John A1 Hayflick, LeonardYR 1977 T1 The Effect of Growth and Urea Concentration on Ammonia Production by a Urea-hydrolysing Mycoplasma (Ureaplasma urealyticum) JF Microbiology, VO 98 IS 2 SP 587 OP 593 DO https://doi.org/10.1099/00221287-98-2-587 PB Microbiology Society, SN 1465-2080, AB Summary: The rate of accumulation of ammonium ion in cultures of Ureaplasma urealyti-cum was independent of the growth rate and of the initial urea concentration above 0·025% in the medium, although the quantity of ammonium ion accumulating did depend on the initial urea concentration. Ammonium ions accumulated at a similar rate in U. urealyticum cultures of both rapidly and slowly growing organisms. Viable but non-growing ureaplasmas also produced ammonia in complete medium at a lower temperature than usual (25°C) or in an inadequate growth medium at 37°C. The rate of ammonium ion accumulation in a dying culture depended on the number of viable organisms present; this is relevant to diagnostic methods for ureaplasmas which depend on detecting ammonia colorimetrically., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-98-2-587