Exam 5: Performance Improvement in the Microbiology Laboratory

Commercial media must have quality control testing performed by the manufacturer.Because of high failure rates,all of the following media must be retested by the hospital laboratory EXCEPT:

Test validation is the ongoing process providing information that a test is performing correctly.The components of validation include all the following EXCEPT:

The efficiency of a test indicates:

All the following are components of JCAHO recommendations for establishing performance monitors EXCEPT:

Confirmation is used after:

Screening is:

All of the following activities will directly affect the quality of a laboratory test EXCEPT:

Susceptibility testing of control organisms is usually conducted daily until precision can be demonstrated with _____ or _____ _____ days of susceptibility testing using Clinical and Laboratory Standards Institute (CLSI)guidelines.

A test is performed on a group of 10 patients.Six patients have a disease,and four are free of the disease.If six patients (all known to have the disease)of this group test positive for the disease,we say that the clinical sensitivity of this test is:

Assume that a certain test for group A Streptococcus has reported sensitivity and specificity of 90% and 98%,respectively,and the estimated prevalence for group A Streptococcus infection in acute pharyngitis is 5%.What is the positive predictive value of this test?

Quality control is designed to:

Quality control stock cultures are available from all of the following EXCEPT:

When a medium needs to be quality controlled because it was prepared in-house or because it is complex,all the following rules must be followed EXCEPT:

An unlabeled specimen is sent from the intensive care unit to the laboratory.When the specimen arrives in the laboratory,the laboratory manager decides that correct action needs to occur.What can be constructed to evaluate and correct the problem?

In any susceptibility system,variables that can affect the results include the following:1.Antibiotic potency2.Inoculum concentration3.Bactericidal level4.Ph5.Anion content

When is a broken process fixed?

A group of 10 patients are to be tested: six are known to have a disease and four are disease free.If the four disease-free patients tested negative for this disease,what would the clinical specificity of this test be?

Reagents that should undergo quality control in the microbiology laboratory include all the following EXCEPT:

Usually,negative test results are more reliable in predicting: