Kirby-Bauer Antimicrobial Susceptibility Test Quiz

As the distance from the disk is away  from the disk on the agar plate for the test, the concentration of an antibiotics will get __________.

• 1. lower

• 1. higher

• identical

What is the Kirby-Bauer Test used for?

1. 
   

• 1. to identify bacterial species.

• 1. to determine gram-positive or negative.

• 1. to determine the susceptibilities against antibiotics.

The larger the zone of inhibition, the _____________ the bacterium is to the antibiotic

• 2. tolerant

• 2. susceptible

• 1. resistant

What is the sensitivity of bacteria to the antibiotic tetracycline if the zone of inhibition is 13 mm?

• 1. Resistant

• 2. Intermediate

• Susceptible

A bacterial species with no zone of inhibition against an antibiotics is considered ______________.

• 1. resistant

• 2. sensitive

• intermediate

A Bacillus species showed 11 mm zone of inhibition with Amoxicillin  in Kirby-Bauer test.

According to the table below, this species is _____________ against Amoxicillin.

• 1. resistant

• 2. intermediate

• susceptible

The size of a zone of inhibition will not be determined by _____________________

• incubator temperature.

• 2. A rate of diffusion  of an antibiotics

• 1. sensitivity of an organisms to an antibiotics

McFarland index is the relationship between ___________________.

• 1. turbidity of a bacterial culture  with bacterial cell number.

• 2. bacterial cell number with pathogenicity

• 1. turbidity of nutrients with agar concentration.

During the procedure in the video, the bacterial culture suspension was vortexed to achieve ________________.

• 2. uniform concentration

• 2. activation of bacterial cells

• 1. higher concentration

The area around a disk on the agar plate is clear free of bacterial cell. This is called zone of ___________________.

• 1. inhibition

• 2. infection

• 1. resistance