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Exam 36: Clinical Microbiology and Immunology

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Question 21

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Which of the following media will permit the growth of one group of bacteria while inhibiting the growth of some other groups?

A) Differential
B) Selective
C) Enrichment
D) Characteristic

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Question 22

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The Gram stain is used for bacteria that have cell walls while the acid-fast stain is used primarily for wall-less bacteria.

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Question 23

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Patients are instructed to collect sputum specimens in such a way as to minimize contamination with normal microbiota from the mouth.A sputum specimen has arrived in the clinical laboratory and a Gram-stained smear of the specimen reveals a mixture of Gram-positive cocci,Gram-negative cocci,and Gram-positive bacilli as well as numerous squamous epithelial cells.This result indicates

A test which uses specific monoclonal antibodies to detect the presence of a pathogen (such as an indirect ELISA)is classified as a molecular genomic technique.

Recommendations regarding hand-washing,handling of pipettes and sharps,prohibition of personal activities such as eating,applying makeup and handing contact lenses,directions regarding decontamination of work surfaces,cultures,and other potentially infectious material are all included in a set of guidelines known as ___________ ______________ __________________.

The immunologic technique involving the transfer of proteins separated by electrophoresis to nitrocellulose sheets is _________.

The purpose of the clinical microbiology laboratory is to maintain cultures of microorganisms.

In the clinical laboratory,which of the following is (are) used as a rapid method of identification?

The most common method used by clinical microbiology labs for identifying bacteria are _________.

A colorless substrate acted on by the enzyme portion of the ligand to produce a colored product is known as a/an _________.

The immunological reaction that occurs when there is an optimal ratio of antigen and antibody,producing a lattice at the zone of equivalence is known _________.

Ten percent Calcofluor White stain is often used in wet mounts of _________.

Detection of single or multiple microorganisms based on their cytometric parameters is known as _________.

Standard microbiological practices include all of the following EXCEPT

An elevated IgM titer typically indicates an active infection while an elevated IgG titer does not distinguish between active and past infections.

Which of the following uses red blood cells?

Which of the following can be examined with an ordinary bright-field microscope?

Indirect immunofluorescence involves fixing the specimen onto a slide,adding fluorochrome-labeled antibodies and then incubating before examining on the microscope.

An example of miniaturized commercial rapid bacterial identification system based on biochemical analysis is the

Clinical microbiologists diagnose some diseases by detecting and measuring the specific host response to the infection.What subdiscipline encompasses these methods?