Table 3: Physiological characteristic of clinical isolates on triple sugar iron agar medium.


Isolated organisms no. Result Interpretation

1 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
2 Red/Yellow with bubbles Glucose fermentation only, gas produced
3 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
4 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
5 Red/Red No fermentation, peptone catabolized
6 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
7 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
8 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
9 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
10 Red/Yellow Glucose fermentation only, peptone catabolized
11 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
12 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
13 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced
14 Red/Yellow with black precipitate Glucose fermentation only, H 2S produced
15 Yellow/Yellow with bubbles Glucose and lactose and/or sucrose fermentation, gas produced