Which is true of E. coli O157:H7?
(a) Ferments sorbitol
(b) Does not ferment sorbitol
(c) Does not ferment glucose
(d) Shows fluorescence when grown on MUG-containing media
Gauri Answered question August 14, 2024
B) does not ferment sorbitol
E. coli O157
is a type of enterohemorrhagic E. coli (EHEC) that is known for its inability to ferment sorbitol, which distinguishes it from most other strains of E. coli. This characteristic can be utilized in selective media, such as sorbitol-MacConkey agar, where O157
colonies remain colorless while other E. coli colonies appear pink due to sorbitol fermentation
Gauri Answered question August 14, 2024