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MDL

J. sarg. Micro test 1

QuestionAnswer
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