To tell:
Why physicians do not invariably prescribe the antimicrobial with the largest zone of inhibition.
Introduction:
The disk-diffusion test is a method applied to evaluate the antibiotic susceptibility. In petri plate (where an antibiotic disk is placed on a uniformly inoculated test pathogen), the clear area (measured in diameter) showing the absence of bacterial growth is referred to as the zone of inhibition. The minimal inhibitory concentration (MIC) is the least antibiotic concentration required to inhibit visible growth of bacteria. The minimal bactericidal concentration (MBC) is the lowest concentration of antibiotic required to kill the bacteria. But, it cannot be used to determine whether an antibiotic is bactericidal or just bacteriostatic. In order to determine MIC and MBC of an antibacterial drug, a broth dilution test is useful.
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EBK MICROBIOLOGY:W/DISEASES BY BODY...-
- Which of the following types of antimicrobial drugs make microbes more susceptible to osmotic pressure? 1) drugs that inhibit nucleic acid synthesis O 2) drugs that inhibit metabolic pathways 3) drugs that inhibit cell wall synthesis 4) drugs that block a pathogen's recognition of its host 5) drugs that inhibit protein synthesisarrow_forwardIf your hospital laboratory isolates streptococcus pneumoniae from four patients on the same day, would you have to test the antimicrobial susceptibility of each isolate? Why or why not?arrow_forwardWhat are the major actions of antimicrobial agents? What criteria are used in the selection of antimicrobial agents?arrow_forward
- Answer all of the questions 1. Which of the following antimicrobial drugs target DNA/RNA synthesis? a) Ciprofloxacin b) Sulfa drugs c) Gentamycin d) Penicilline) Polymyxin B 2. Which of the following antimicrobial drugs target protein synthesis? a) Ciprofloxacin b) Sulfa drugs c) Gentamycin d) Penicilline) Polymyxin B 3. true or false: Streptococcus is killed by growing on blood agar.arrow_forwardWhat are the reasons for the failure of antimicrobial treatment?arrow_forwardList five cellular or structural mechanisms that microbes use to resist antimicrobials.arrow_forward
- What is the purpose of the antimicrobial susceptibility test? What information can you gather from this method?arrow_forwardGive a short comparison between alcohols and aldehydes as chemical antimicrobial agents.arrow_forwardA newly admitted patient reports a penicillin allery. The prescriber has ordered a second-eneration cephalosporin as part of the therapy. Which nursin action is appropriate?a) Call the prescriber to clarify the order because of the patient’s allery.b )Give the medication, and monitor for adverse effects.c) Ask the pharmacy to chane the order to a first-eneration cephalosporin.d )Administer the dru with a nonsteroidal antiinflammatory dru to reduce adverse effectsarrow_forward
- Essentials of Pharmacology for Health ProfessionsNursingISBN:9781305441620Author:WOODROWPublisher:Cengage