Deck 18: Microbiology

Question 1

Dental assistants should be immunized against:

A)hepatitis B.
B)HIV.
C)tetanus.
D)both a and c.

Answer 1

both a and c.

Question 2

Which of the following types of bacteria have a rod-like shape?

A)Cocci
B)Diplococci
C)Bacilli
D)Spirochetes

Answer 2

Bacilli

Question 3

Which of the following is not a dental sign of second-stage infectious syphilis?

A)Split papules at the corners of the mouth
B)Hairy tongue
C)Grayish-white, moist, "mucous patches" on the tongue, roof of the mouth, tonsils, or inner surfaces of the lips
D)Generalized measles-type rash, poxlike pustules, oozing sores, and hair falling out of the scalp

Answer 3

Hairy tongue

Question 4

Bacteria that require oxygen in order to grow are called:

A)aerobes.
B)anaerobes.
C)spores.
D)gram-negative.

Question 5

Chemicals such as chlorine (bleach),iodine,phenol,and formaldehyde are:

A)unable to destroy viruses on surfaces coming into contact with infected patients.
B)unable to destroy viruses on objects coming into contact with infected patients.
C)too toxic to be used internally.
D)used internally as effective antiviral medications.

Question 6

Antibiotics are ineffective in treating disease caused by:

A)bacteria.
B)spores.
C)anaerobes.
D)viral infections.

Question 7

The disease that is transmitted through bloodborne contact and breaks down the body's immune system is:

A)HIV.
B)tuberculosis.
C)tetanus.
D)syphilis.

Question 8

The most resistant form of life known is a(n):

A)virulent fungus.
B)capsule.
C)spore.
D)anaerobe.

Question 9

Microorganisms that produce disease in humans are known as:

A)nonpathogenic.
B)pathogens.
C)pasteurized.
D)germs.

Question 10

A virus that prefers a particular cell type in order to replicate is said to have:

A)diversity.
B)latency.
C)specificity.
D)singularity.

Question 11

Oral candidiasis is an opportunistic infection caused by:

A)yeast.
B)water.
C)protozoa.
D)none of the above.

Question 12

What is the name of a new and separate class of disease-producing molecules that convert normal protein molecules into dangerous ones?

A)Prions
B)Scrapie
C)DNA/RNA
D)Algae

Question 13

What type of microorganism can live and multiply only inside an appropriate host cell?

A)Bacteria
B)Viruses
C)Protozoa
D)Algae
E)Fungi

Question 14

It is important for the dental assistant to have a foundation in microbiology in order to:

A)understand the nature of pathogens.
B)cure disease.
C)know how to prevent disease transmission in the dental office.
D)both a and c.

Question 15

Currently all prion diseases found in humans affect the:

A)heart.
B)lungs.
C)brain.
D)immune system.

Question 16

A large group of one-celled organisms that are found in freshwater and marine habitats,and in moist soil,are:

A)algae.
B)protozoa.
C)fungi.
D)rickettsiae.

Question 17

How many major groups of microorganisms are there?

A)5
B)10
C)7
D)3

Question 18

The study of microorganisms is:

A)anatomy.
B)microbiology.
C)antiseptic.
D)disinfectant.

Question 19

Which infectious disease is a leading cause of death worldwide and is an occupational risk for healthcare workers?

A)Legionnaires' disease
B)HIV
C)Tetanus
D)Tuberculosis

Question 20

The benchmark for the effectiveness of a surface disinfectant is the "kill time" for:

A)West Nile virus.
B)tetanus.
C)tuberculosis.
D)syphilis.

Question 21

Which of the following diseases can be prevented via immunization?

A)Hepatitis E
B)Hepatitis C
C)Hepatitis B
D)HIV

Question 22

A viral disease can be transmitted through:

A)direct contact and blood transfusion.
B)insects and contaminated food or water.
C)coughing or sneezing.
D)all of the above.

Question 23

Which herpes simplex virus type causes sores on the lips (also known as fever blisters or cold sores)?

A)Herpes zoster virus
B)Herpes simplex type 2
C)Both a and b
D)Herpes simplex type 1

Question 24

Which of the following types of bacteria have a spherical shape?

A)Cocci
B)Gram-positive bacteria
C)Bacilli
D)Spirochetes

Question 25

Which chemicals are capable of destroying viruses in an external environment?

A)Chlorine (bleach), iodine, phenol, and formaldehyde
B)Alcohol, Lysol
C)Birex, antimicrobial soap
D)All of the above

Question 26

The famous chemist who disproved the theory of spontaneous generation of life associated with living microorganisms and disease was:

A)Louis Pasteur.
B)Aristotle.
C)Robert Koch.
D)Joseph Lister.

Question 27

The type of spores that normally live in the intestinal tract of insects is:

A)virulent fungus.
B)capsules.
C)rickettsiae.
D)anaerobes.

Question 28

Which disease is transmitted through a wound or puncture from a soiled instrument and affects the nervous system?

A)HIV
B)Tuberculosis
C)Tetanus
D)Syphilis

Question 29

Which vaccine can protect against chronic HBV infection for a period of at least 15 years?

A)HIV
B)Hepatitis A
C)HBV
D)Herpesvirus

Question 30

Which of the following diseases is the most serious and presents a high risk to dental personnel since dental treatment brings them into contact with saliva and blood?

A)Hepatitis A
B)Hepatitis B
C)Hepatitis C
D)Hepatitis D

Question 31

The state established by some viruses in host cells is known as:

A)latent (dormant).
B)specificity.
C)exposure.
D)none of the above.

Question 32

Which type of microorganism is known as a double-stranded DNA virus capable of causing chickenpox,shingles,measles,and herpes?

A)Hepatitis B
B)HIV
C)Both a and b
D)Herpesvirus

Question 33

Bacteria that do not require oxygen in order to grow are called:

A)anaerobes.
B)aerobes.
C)spores.
D)gram-negative.

Question 34

The study of viruses and their effects is called:

A)diversity.
B)latency.
C)virology.
D)singularity.

Question 35

Which of the following viruses breaks down the body's immune system?

A)Legionnaires' disease
B)HIV
C)Tetanus
D)Tuberculosis

Question 36

________ microorganisms do not produce human illness.

A)Virus
B)Nonpathogenic
C)Pasteurized
D)Germ

Question 37

The primary cause of mononucleosis and malignancy of the lymph tissues is:

A)herpes zoster.
B)spores.
C)herpes type 1.
D)Epstein-Barr virus.

Question 38

The bacteria found in freshwater and marine habitats and that contain chlorophyll are:

A)protozoa.
B)algae.
C)fungi.
D)rickettsiae.

Question 39

_______ is an extremely dangerous disease caused by a spore-forming bacillus found in soil,dust,or animal or human feces.

A)Legionnaires' disease
B)Syphilis
C)Tuberculosis
D)Tetanus