Author Question: An organism that is unable to grow in ambient air, grows as tiny colonies in 5 to 10 oxygen and 10 ... (Read 100 times)

joe · **on:** Jun 25, 2018

An organism that is unable to grow in ambient air, grows as tiny colonies in 5 to 10 oxygen and 10 CO2, and grows under anaerobic environment is called a

A) microaerophilic organism. B) strict anaerobe.
C) microaerotolerant anaerobe. D) facultative anaerobe.

Question 2

A day shift microbiologist encounters an oxidase negative, non-lactose fermenter in a urine culture. To determine if it is a member of the Enterobacteriaceae or a nonfermenter, he sets up a TSI agar slant.

After 10 hours of incubation at 35C in ambient air, the evening shift microbiologist reads the tube as a yellow slant and yellow deep or butt. This result
A) indicates a member of the Enterobacteriaceae.
B) could be due to a gram-positive organism. Perform a Gram stain.
C) is invalid.
D) indicates a nonfermenter.