Results of Kirby Bauer test on E. Coli with penicilin , ampicilin, tetracycline, chloramphenicol disks showed zero zone of inhibition while there were zones around all these disks on S. aureus this should be interpreted as this drug is narrow spectrum a) True b) False
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Results of Kirby Bauer test on E. Coli with penicilin , ampicilin, tetracycline, chloramphenicol disks showed zero zone of inhibition while there were zones around all these disks on S. aureus this should be interpreted as this drug is narrow spectrum
a) True
b) False
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- The following results were obtained from a disk diffusion test for a strain of Escherichia coli. Chemotherapeutic Zone of inhibition (mm) A 7 B 10 C 18 D 3 Which drug above (A, B, C, or D) is most effective against this E. coli strain? ***Which drug above (A, B, C, or D) is most effective against Staphylococcus aureus? Explain your answer.With the aid of diagrams, illustrate the biochemical basis of the following: Allopurinol used in the management of gout Hydroxyurea as an antineoplastic agent 6-mercaptopurine, an anticancer agent Trimethoprim, an antibacterial agentWhich ONE of the following best describes nitrofurantoin? Select one: A. A macrolide antimicrobial agent B. An antimicrobial prodrug C. A natural product produced by Streptomyces spp. D. Useful in treating systemic infections E. A nucleic acid synthesis inhibitor Which ONE of the following best describes cephalexin? Select one: A. The bacterial target is located on the internal side of the cytoplasmic membrane B. An agent suitable for community use C. Resistance readily occurs via drug efflux in Gram-positive bacteria D. A parenteral penicillin E. An agent capable of disrupting bacterial membranes Which ONE of the following best describes ciprofloxacin? Select one: A. Active against Streptococcus pneumoniae B. An inhibitor of RNA synthesis C. An antimicrobial prodrug D. A natural product produced by Streptomyces spp. E. Subject to new restrictions and precautions for use due to very rare reports of…
- Which of the culture given use of antibiotics amapicillin,chloramphenicol and steptomycin is most effective and least effective in a E. colidiameter AM=47MM TE= 27 MM both left hand side is ampicillin and right hand side is tetracycline With reference to the table below, determine the antibiotic susceptibilities of different antibiotics against coli and S.aureus. S.aureus Antimicrobial agent Interpretive categories and zone diameter breakpoints, nearest whole mm sensitive Intermediate resistant Tetracycline >19 15-18 <14What bacterial structural target would make an antibacterial drug selective for gram-negative bacteria? Provide one example of an antimicrobial compound that targets this structure.
- Not only is blood agar an enriched medium that can support fastidious organism growth, but it can also serve as a differential medium in the identification of streptococcal species because of the presence of red blood cells that can be destroyed by an organism's hemolysins. Looking at this photo, how could you describe the organism growing on the surface of this blood agar plate? Multiple Choice a) Gamma-hemolytic b) Alpha-hemolytic c) Non-hemolytic d) Beta-hemolyticDifferentiate Streptolysin O from Streptolysin S. What titer is significant for streptococcal infection? Discuss the principle behind ASO titration method based on Neutralization reaction.Since all of the ββ-lactams that you have tested are susceptible to hydrolysis by PaESBL-1, the hospital will not be able to use a single ββ-lactam to combat this P. aeruginosa isolate. You need to consider alternative strategies. From the following list, select all of the strategies that might successfully overcome the broad substrate specificity of PaESBL-1:
- Vibrio cholerae can be cultured on Thiosulfate-Citrate-Bile salts-Sucrose agar (TCBS). Enterobacteriaceae and gram-positive bacteria are inhibited on this agar. cholerae produces large yellow colonies while other Vibrio species produce blue, green, or blue-green colonies. Discuss the purpose of each media listed. Based on this information alone, what term(s) would best describe this agar? Selective Enrichment (enriched) Differential Reducing Selective and enriched Selective and differential Selective, differential, and enrichedThe reason why most antibiotics as oral suspension dosage forms are commercially available as dry powders, to be reconstituted with water just prior to dispensing, is:refer to the diagram left hand side is Tetracycline and right hand side is ampicillin. please help to describe the observation and explain these two antibiotics are sensitive or not.