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MDL
J. sarg. Micro test 1
| Question | Answer |
|---|---|
| A Mc Farland standard of 0.5 corresponds to a bacterial count of | 1.5 x 10(8)cfuml |
| The mode of action of erythromycin and azithromycin is: | Inhibition of protein synthesis |
| Quality control records for media and reagents should be maintained a minimum of: | 2 years |
| It is not necessary to perform quality control on user prepared MacConkey plates because it is exempt | false |
| The spectrum of activity for aminoglycosides is | aerobic gram positive and gram negative bacteria |
| Proficiency testing in the Microbiology lab will evaluate the accuracy of personnel and procedures | True |
| Supplemental testing of Enterococcus spp.for detection of high level resistance to which class of antimicrobials would demonstrate if synergy with ampicillin is possible? | aminoglycosides |
| All of the following are usually effective against gram negative bacteria except | vancomycin |
| Specimens for bacterial culture were submitted from a burn patient. The culture grew a non lactose fermenting gram negative rod identified as Pseudomonas aeruginosa. Disk diffusion testing was performed with the following results. Ampicillin=16mm Cefazo | LVX D. Susceptible D. Susceptible AM B. Resistant B. Resistant CZ A. Intermediate A. Intermediate TIM A. Intermediate A. Intermediate |
| Growth of Enterococcus faecalis on a vancomycin agar screen plate would indicate that the organism is | Resistant to vancomycin |
| A reference lab has performed a rare manual macrodilution MIC test. Based on the growth in these tubes, what is the MIC value of the antimicrobial? | 8.0mcg/ml |
| In order to determine the MBC in the previous question . You would | Subculture tubes 8.0-256 |
| An isolate of E. coli was found to be ESBL positive, it should be reported as resistant to | Cephalosporins |
| The use of ATCC reference organisms when performing quality control on established procedures will confirm the following | Validity and reliability |
| This test uses the patient's own serum and can be used to monitor antimicrobic therapy as well as the effects of antibodies and complement | SBC (SBT) |
| Providing detailed instruction to nurses for proper specimen collection will effect this area of Quality Assessment | Preanalytical |
| A large disk diffusion zone size will correspond to a low MIC value A large disk diffusion zone size will correspond to a low MIC value | True |
| The action of this antimicrobial in the class of Fluoroquinolones is generally bacteriocidal | Levofloxacin |
| When performing routine AST quality control, after the initial 20 day testing period, labs are required to test their systems | weekly |
| Reference bacterial organisms are available through which of the following sources? | atcc |
| Antimicrobial resistance resulting from the normal genetic, structural, or physiologic state of a microorganism is defined as | intrinsic |
| Which of the following will define test performance, reagent preparation, quality control and results reporting as well as signed by the microbiology supervisor | Standard operating procedure manual |
| Preanalytical instructions to patient providers in clinics should indicate that which specimen may be refrigerated? | urnie |
| Which bacterial combinations represent the most appropriate quality control organisms when testing a new lot number of catalase test reagent | Staphylococcus aureus and Streptococcus pyogenes |
| The testing method demonstrated here will confirm an organism's resistance to: | carbapenams |
| The MIC value of Oxacillin ( OX)when read from this microdilution plate is: | >4.0 mcg/ml |
| Which of the following is not an example of intrinsic antibiotic resistance? | Staphylocococcus vs. oxacillin |
| What is the interpretation for Ampicillin (AM) based on following MIC interpretive standards : >=1.0 mcg/ml: susceptible 2-4 mcg/ml: intermediate >=8 mcg/ml: resistant | susceptible |
| When performing disk diffusion QC, only one disk out of twelve is out of range. What is the most likely explanation | bad disk |
| Panic values should be called immediately to the first available health care worker. | False |
| Quality Assurance is associated with those external activities that ensure positive patient outcomes | true |
| Microbiology turnaround time can be defined as the elapsed time between | Specimen receipt in the lab and reporting of final results |
| 3 appropriate organisms to use when performing QC on a new lot of API 20E test systems would be | E. coli, Klebsiella pneumoniae, Proteus mirabilis |
| Daily review by the Microbiology supervisor of AST results that have been reported is an analytic function. | false |
| An isolate of Staph aureus is determined to be resistant to Linezolid. This antimicrobial is the most appropriate for treatment | false |
| Disk diffusion testing was performed on an isolate of Pseudomonas aeruginosa from a urine culture. Numerous colonies were observed within the zone of this antimicrobial. What is the most probable cause? | Resistant mutants |
| Most antimicrobials are cleared by which organ? | Liver |
| Commercially prepared media are always exempt from quality control testing | False |
| Penicillin susceptibility in isolates of Streptococcus pneumoniae can be determined using the following disk diffusion | Oxicillian |
| Which of these criteria is not used by the laboratory in determining if antimicrobial testing will be performed | Status of patients immune system |
| Quality control for AST disk diffusion was performed and it was noted that numerous zone sizes were too small. The test was repeated with a new lot number of mueller hinton agar and all zone sizes were within an acceptable range. Which is the best explana | Media to thick |
| Resistance of Staphylococcus to methicillin, penicillin and other beta lactams may be detected by testing with this predictor drug | oxicillian |
| Protein synthesis is the principe mode of action of which of these antimicrobial pairs | cephalosporin (cefinase) disk |
| The zone of inhibition of disk A, is most likely to correspond to which of the following MIC results. | 64mcg/ml |
| When the activity of a combination of antimicrobials is substantially greater than the activity of the single most active one. The effect is: | Synergistic |
| Extended spectrum beta lactamase (ESBL) testing will be useful as a part of the AST of | Enterobacteriaceae |
| The "D" test will test for the resistance of which antimicrobial among S. aureus isolates | clindamycin |
| Ampicillin treatment will achieve adequate levels in | A,B,C |
| beta-lactamase inhibitor F. Tazobactam F. Tazobactam glycopeptide I. vancomycin I. vancomycin macrolide A. Erythromycin A. Erythromycin CAP D. Private certifying agency D. Private certifying |
Created by:
welma72
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