1
Which of the following best describes the results of a Gram stain?
All bacteria will turn yellow.
Gram negative bacteria will turn purple.
Gram positive bacteria will turn purple.
Gram positive bacteria will not have any color.
Gram positive bacteria will turn purple.
What is the organism that causes strep throat?
Group A, alpha-hemolytic streptococcus
Group B, beta-hemolytic streptococcus
Group B, alpha-hemolytic streptococcus
Group A, beta-hemolytic streptococcus
Group A, beta-hemolytic streptococcus
Which of the following bacteria are purple rods when the staining process is complete?
Gram-positive bacilli
Gram-negative spirilla
Gram-positive cocci
Gram-negative bacilli
Gram-positive bacilli
Which of the following best describes the use of a culturette tube?
Transporting stool samples
All the above
Transporting blood specimens
Keeping the swab moist
Keeping the swab moist
Giardiasis Lamblia is often contracted by which of the following?
Athletes
Mountain hikers
Children
Sanitation workers
Mountain hikers
The correct specimen and diagnostic test used to identify ova and parasites is
Stool and culture
None of the above
Urine and a culture and sensitivity
Vaginal and culture
Stool and culture
Which of the following is NOT given out as patient education to relieve discomfort and help patients toward better health?
Dress comfortably according to the weather.
Avoid tobacco.
Cough or sneeze into a tissue.
Decrease water intake.
Decrease water intake.
Which of the following bacteria are round in shape and can occur in clusters or pairs?
Cocci
Bacilli
Spirilla
None of the above
Cocci
Which of the following is NOT an appropriate action when handling microbiology specimens?
Use the appropriate container when sending specimens to an outside lab.
Look for leaks on the outside of the transporting container.
Handle the specimen as if it is not contaminated.
Wear gloves.
Handle the specimen as if it is not contaminated.
Which of the following best describes placing a sample of body secretions on a special medium to allow bacteria to grow?
Which of the following is NOT included in inoculating techniques?
Loop
Colony count
Random streak
Lawn streak
Random streak
Which of the following methods is used for maintaining an anaerobic condition?
Petri dish
Safety hood
Incubator
Gas pack jar
Gas pack jar
Which of the following should be used when obtaining a nasopharyngeal collection for a culture?
None of the above
Sterile tongue depressor
Special swab on a thin wire
Sterile applicator stick
Special swab on a thin wire
Which of the following is NOT part of a quality control program in microbiology?
Do not use media past the shelf life.
Monitor all equipment with temperature controls daily.
Update the laboratory manual daily.
Make the SDS available to reference.
Update the laboratory manual daily.
Which of the following is true regarding culture
Agar contains nutrients in a prepared petri dish
The agar is considered liquid form.
Media can be solid, liquid, or gas.
Semisolid is made by adding more agar.
Agar contains nutrients in a prepared petri dish
Which of the following is the nuclear material in all cells?
DNA
Cytoplasm
Ribosomes
RNA
DNA
Which of the following best describes how a bacterium is determined to be Gram positive or negative?
Nature of the cytoplasm
Ability to retain or lose color
Presence of ribosomes
Absence of cytoplasm
Ability to retain or lose color
Media that that contains substances that alter the appearance of some organisms and not others is called:
Selective media
Enriched media
Basic media
Differential media
Differential media
How can a fungus infection be diagnosed?
Use a Wood’s lantern.
Use a Woody lamp.
Use a Wooden lamp.
Use a Wood’s lamp.
Use a Wood’s lamp.
Which of the following is used for a stab culture?
Bunsen burner
Inoculating loop
Inoculating needle
Incinerator
Inoculating needle
Which of the following applies to the collection of specimens?
Lab assistants do not need to wear gloves.
Wear gloves only when needed.
Must strictly adhere to standard precautions.
Occasionally follow instructions in the lab manual.
Must strictly adhere to standard precautions.
If a spill should occur in the lab, which of the the following agents is used for cleanup:
10% phenol
2% phenol
10% bleach
3% bleach
10% bleach
After the agar plate has been inoculated and properly labeled, what must you do with the plate?
Turn it upside down, and place in the proper environment for growth.
Place it back with the other agar plates in the original package.
Nothing, agar plates require nothing special.
Leave it right-side-up, and place in the proper environment for growth.
Turn it upside down, and place in the proper environment for growth.
Which of the following is the next step when there is more than one pathogen growing in a bacterial culture?
Set up a subculture and separate bacteria to another media.
Obtain another specimen.
Use a dissecting microscope.
Wait an additional 36 hours to identify the predominant organism.
Set up a subculture and separate bacteria to another media.
A wet mount is used to:
Stain bacteria
Examine organisms under a microscope
Both b and c
Suspend the organism in a liquid to study
Both b and c