K/ACit+

Alkaline/Acid Citrate Positive Group
This organism has Group D Salmonella, Providencia rettgeri, and Providencia stuartii. These are seperated by Phenylalanine and Urease. Hydrogen Sulfide positive also helps with identifying Salmonella.

Tests
Essential: Urease, Phenylalanine

Helpful: TSI sulfur result

Key
1-A: Phenylalanine negative, Sulfide positive, Urease negative Salmonella Group D

1-B: Phenylalanine positive, Sulfide negative GO TO 2

2-A: Urease positive Providencia rettgeri

2-B: Urease negative Providencia stuartii