2nd Year Clinical Bacteriology Antibacterial Drugs Quiz

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Which type of antibiotics stop bacterial growth but do not kill the bacteria?

Antibiotic resistant

Bactericidal

Bacteriolytic

Bacteriostatic (correct)

What is the mechanism of action of Rifampicin among the following choices?

DNA synthesis inhibition

Cell wall synthesis inhibition

Protein synthesis inhibition (correct)

Cell membrane disruption

In antimicrobial susceptibility testing, which type of antibiotic interaction results in one drug interfering with the activity of another?

Synergistic

Antagonistic (correct)

Indifferent

Additive

What is the purpose of testing antibiotic combinations?

For better treatment outcomes Signup and view all the answers

Which antibiotic is known for causing teeth staining and should not be given in excess?

Tetracycline Signup and view all the answers

What is the purpose of serially distributing the concentration of antibiotics in MACROBROTH / TUBE DM?

To create varying concentrations for different bacterial strains Signup and view all the answers

Which method employs boring holes onto agar for the diffusion of antibiotics?

AGAR CUP DIFFUSION METHOD Signup and view all the answers

What is the main difference between AGAR CYLINDER DIFFUSION METHOD and MICROTUBE DILUTION METHOD?

Method of dispensing antibiotics Signup and view all the answers

Which bacterium is represented by the code 29212 in the ATCC listing?

Enterococcus foecalis Signup and view all the answers

What is the purpose of using a tray with antibiotics and alamar Blue indicator in the ALAMAR SYSTEM?

To measure antibiotic susceptibility visually Signup and view all the answers

What is the standard inoculum size used in MACROBROTH / TUBE DM?

$5x10^5$ CFU/mL Signup and view all the answers

In the Kirby-Bauer disk diffusion test, standardized suspensions of organisms are inoculated onto which type of agar?

Mueller-Hinton agar Signup and view all the answers

What is the purpose of incubating the agar plate upside down during the Kirby-Bauer disk diffusion test?

To prevent the agar from drying out Signup and view all the answers

Which bacteria require incubation at 35°C for 16-18 hours during the Kirby-Bauer disk diffusion test?

Enterobacteriaceae Signup and view all the answers

What is used to standardize the pure inoculum in the Kirby-Bauer disk diffusion test?

Mcfarland standard Signup and view all the answers

How are antibiotic discs impregnated with paper discs transferred aseptically during the Kirby-Bauer disk diffusion test?

Using forceps with proper distance maintained between each disc Signup and view all the answers

How is antimicrobial susceptibility interpreted after measuring the zone of inhibition in the Kirby-Bauer disk diffusion test?

Using a ruler to measure in millimeters and comparing to CLSI table Signup and view all the answers

2nd Year Clinical Bacteriology Antibacterial Drugs Quiz

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