Question

6. You isolated a E. coli strain from a gastro enteric infection, the physician ask you to make a Kirby Bauer test to identify the best antibiotic to eradicate the infection. The results are placed in the table below, Indentify the antibiotics that the bacteria is susceptible and resistant and draw how the inoculated plate would look like Antibiotic name Inhibitory Area and dose (mm) Interpretative Inhibition Zone Resistant (mm) Susceptible or resistant Interpretative Inhibition Zone Susceptible (mm) 215 311 Streptomycin 15 10 ug Tetracycline 305 ug Ampcillin 10ug 10 514 219 311 2 14

Answer 1

6. You isolated a E. coli strain from a gastro enteric infection, the physician ask you to make a Kirby Bauer test to identify the best antibiotic to eradicate the infection. The results are placed in the table below, Indentify the antibiotics that the bacteria is susceptible and resistant and draw how the inoculated plate would look like Antibiotic name Inhibitory Area Interpretative Inhibition Zone Resistant (mm) Interpretative Inhibition Zone Susceptible or resistant (mm) and dose Susceptible (mm) 15 Streptomycin 10 ug Tetracycline 30 s11 215 susceptible 5 s14 19 resistant ug Ampcillin 10ug 10 resistant S11 14

How to interpret a diameter as as zone of inhibition is given in the data table itself.

For streptomycin, if the inhibitory area is equal to or more than 15 mm, then the bacteria will be susceptible to streptomycin.

For tetracycline, if the inhibitory area is equal to or more than 19 mm, then the bacteria will be susceptible to tetracycline.

For ampicillin, is the inhibitory area is equal to or more than 14 mm, then the bacteria will be susceptible to ampicillin.

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