In disinfectant susceptibility testing, a large zone of no growth surrounding an antimicrobial disk on a test plate would most likely be interpreted as: Group of answer choices A sensitive reaction Impossible to tell without knowing the bacterium tested Impossible to tell without knowing the concentration of the disinfectant A resistant reaction An intermediate reaction

In the __________, paper disks impregnated with antibiotics are added to a solid medium inoculated with a standard amount of a pure bacterial culture to test whether the organism is sensitive, intermediate, or resistant to the drug.ANSWERantimicrobial response testbroth dilution testE-testKirby-Bauer test

The use of aseptic technique in a student lab reduces the chances of bacteria used in cultures contaminating the students. Group of answer choices True False\

If there is NO zone of inhibition present, the bacteria is said to be ____ to the antibiotic. susceptibleintermediately susceptibleresistant

A disk-diffusion test using Staphylococcus gave the following results: Antiseptic Zone of inhibition (mm) A 0 B 2.5 C 10 D 5 Which antiseptic was the most effective against Staphylococcus? Group of answer choices C B Can't tell A D

Resistant and nonresistant E. coli bacteria samples were spread on the agar plates below and incubated for 24 hours.  The streptomycin negative with resistant E. coli. appears spread throughout the plate.The streptomycin positive with resistant E. coli. appears spread throughout the plate.The streptomycin negative with non-resistant E. coli. appears spread throughout the plate.The streptomycin positive with non-resistant E. coli. appears concentrated at three points on the plate. Select the true statements from the list below.Check All That ApplyThe resistant E. coli strain grows on streptomycin negative plates.The resistant E. coli strain grows on streptomycin negative plates.The nonresistant E. coli strain grows on streptomycin negative plates.The nonresistant E. coli strain grows on streptomycin negative plates.The nonresistant E. coli strain grows the same on streptomycin positive or negative plates.The nonresistant E. coli strain grows the same on streptomycin positive or negative plates.The resistant E. coli strain grows on streptomycin positive plates.The resistant E. coli strain grows on streptomycin positive plates.Both resistant and nonresistant E. coli strain show no growth on streptomycin positive plates.