results because the organism can be found as normal flora in some patient populations?
a. Neisseria gonorrhoeae b. HIV
c. Chlamydophila pneumoniae d. Streptococcus pneumoniae
4. Which of the following controls are critical for ensuring that amplification is occurring in a patient sample and that the lack of PCR product is not due to the presence of inhibitors?
a. Reagent blank b. Sensitivity control c. Negative control d. Amplification control
5. A PCR assay performed to detect Bordetella pertussis on sputum obtained from a 14-year-old girl who has had a chronic cough had two bands, one consistent with the internal control and the other consistent with the size expected for amplification of the B. pertussis target. How should these results be interpreted?
a. False positive for B. pertussis b. The girl has clinically significant B. pertussis infection c. B. pertussis detection is more likely due to colonization d. Invalid because two bands were present
6. Which of the following is a disadvantage of molecular-based testing?
a. Results stay positive longer after treatment than do cultures b. Results are available within hours c. Only viable cells yield positive results d. Several milliliters of specimen must be submitted for analysis
7. A molecular-based typing method that has high typing capacity, reproducibility and discriminatory power, moderate ease of performance, and good to moderate ease of interpretation is:
a. Repetitive elements b. PFGE
c. Plasmid analysis d. PCR-RFLP
8. A patient has antibodies against HCV and a viral load of 100,000 copies/mL. What is the next test that should be performed on this patient's isolate?
a. Riboyping b. PCR-RFLP
c. Hybrid capture d. Inno-LiPA HCV genotyping
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Molecular Detection of Inherited Diseases
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