After 24 hours incubation at 35C in CO2, the cystine trypticase agar tubes of an oxidase-positive, gram-negative diplococcus provides the following reactions:
Control tubeyellow
Glucoseyellow
Maltoseyellow
Lactoseyellow
Maltoseyellow
These results
A) indicate a nonpathogen.
B) indicate a potential pathogen.
C) are invalid.
D) should be read again after an additional 24 hours incubation.
Question 2
The nitrate reductase test for preculture screening of urines has low sensitivity if
A) the organism does not reduce nitrate.
B) the specimen is collected by suprapubic aspiration.
C) there are fewer than 105 organisms/mL.
D) all of the above.
E) A and B
Our body in 24 hours
Nutrient Agar
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