Blog

Resistant and nonresistant E. coli bacteria samples were spread on the agar plates below and incubated for 24 hours. Select all of the true statements from the list below.

A large zone of inhibition around a disk containing an antibiotic generally indicates that the bacteria being tested is resistant to the antibiotic. See the zone of inhibition circled in blue.

Which of the following can determine the particular glucose fermentation pathway used by a fermenting microorganism?

Which reagents are used in the Voges-Proskauer (VP) test?

Which of the following apply to the development of streptomycin resistance in E. coli? Select all that apply.

What indicates a positive result for mannitol fermentation on MSA?

A 67-year-old woman arrives at the emergency department with acute bleeding into the back of the throat. A coagulation screen is ordered with the following results: Test Result Reference Range 1:1 Mix With Normal Plasma Prothrombin time (PT) 12 seconds 11–15 seconds   Partial thromboplastin time (PTT) 57 seconds 25–37 seconds 36 seconds (immediate) Fibrinogen 450 mg/dL 150–400 mg/dL   What would be a reasonable next step to perform?

Who is ultimately responsible for determining the specimen integrity before analysis?

Which of the following can be evaluated only through the microscopic examination of a stained blood film?

Dr. Angela Davis knew the four black girls who were killed by the KKK at 16th Street Baptist Church.