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Table 2 B. suis strains: generation time (doubling time, h) in TSB and urease activity in urease test broth.

From: Brucella suis urease encoded by ure 1 but not ure 2 is necessary for intestinal infection of BALB/c mice

Strain Doubling time (h)* Urease activity
   Qualitative** Quantitative***
1330 5.1 + 9.28
1330Δure 1K 5.8 - ~0
1330Δure 2K 5.3 + 9.38
1330Δure 2C 5.1 + 8.28
1330Δure 1K1330Δure 2C 6.5 - ~0
  1. *A representative experiment was used to calculate the generation time.
  2. ** + represents positive or pink color and – represents negative or yellow color of the uninoculated test broth; the color remained unchanged even 96 h after inoculation
  3. ***Specific activity μmoles/min/mg of protein.