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cmb 211 > quiz 8 > Flashcards

quiz 8 Flashcards

1
Q

Encapsulated strains of Streptococcus pneumoniae are particularly pathogenic, because they
A. produce exotoxin A.
B. are potentially very invasive.
C. produce M protein surface antigens.
D. produce exotoxin B.

A

B. are potentially very invasive.

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2
Q

Psychrotolerant microorganisms can survive and grow at
A. extreme fluctuations in water availability.
B. boiling temperatures.
C. refrigeration temperatures.
D. high salt or sugar concentrations.

A

C. refrigeration temperatures.

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3
Q

The inflammatory response to Corynebacterium diphtheriae infection results in the production of a lesion called a
A. lesion.
B. chancre.
C. pustule.
D. pseudomembrane.

A

D. pseudomembrane.

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4
Q

Tetanus develops from a puncture wound because
A. the organism gains access to the circulatory system and then invades the nervous system.
B. the organism needs access to the circulatory system and deep connective tissues.
C. the organism’s endospores germinate in anoxic conditions.
D. the organism digests deep connective tissues.

A

C. the organism’s endospores germinate in anoxic conditions.

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5
Q

The rickettsias are divided into groups based loosely on
A. their biochemical requirements.
B. their insect vectors.
C. taxonomy.
D. the types of clinical disease they produce.

A

D. the types of clinical disease they produce.

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6
Q

Which of the following are group A Streptococcus (GAS)?
A. Streptococcus pyogenes
B. Streptococcus pneumoniae
C. Streptococcus agalactiae
D. Streptococcus viridans

A

A. Streptococcus pyogenes

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7
Q

The most prevalent human infectious diseases are caused by_____ because they often remain infectious in dried mucus.
A. protozoans.
B. bacteria.
C. fungi.
D. viruses.

A

D. viruses.

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8
Q

Influenza A virus can be identified by which of the following surface glycoproteins?
A. NA
B. HA
C. Both HA and NA
D. M protein

A

C. Both HA and NA

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9
Q

The causative agent of streptococcal pharyngitis, also known as ʺstrep throat,ʺ is
A. Streptococcus lactis.
B. Streptococcus pyogenes.
C. Streptococcus mutans.
D. Streptococcus pneumoniae.

A

B. Streptococcus pyogenes.

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10
Q

The most common infectious disease (hint: viral) is
A. gonorrhea.
B. hepatitis.
C. influenza.
D. the common cold.

A

D. the common cold.

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11
Q

What is the medium used in the membrane filter (MF) procedure to differentiate fecal coliforms and Escherichia coli?
A. Triple sugar iron agar
B. Mannitol salt agar (MSA)
C. Eosin-methylene blue agar (EMB)
D. Blood agar

A

C. Eosin-methylene blue agar (EMB)

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12
Q

Hemoflagellates that cause tropical diseases such as sleeping sickness and Chagas disease are all transmitted by
A. sexual contact.
B. contact with fecal contaminated soil.
C. contact with contaminated water.
D. insect vectors.

A

D. insect vectors.

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13
Q

Flour and sugar are classified as ________ foods.
A. highly perishable
B. nonperishable
C. semiperishable
D. selectively perishable

A

B. nonperishable

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14
Q

Cryptosporidium parvum oocysts are highly resistant to
A. heat.
B. desiccation.
C. UV radiation
D. filtration.

A

C. UV radiation

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15
Q

If you were exposed to a sick animal that was found to have negri bodies in its nervous system in a postmortem examination, how would you be treated to prevent disease?
A. Antibiotics to treat Lyme disease
B. Passive immunization against rabies
C. Observation to detect tick or lice bites
D. Antiviral medication

A

B. Passive immunization against rabies

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16
Q

Which of the following is the defining characteristic of acid fast bacteria?
A. A thin cell membrane made of phospholipids
B. A polypeptide layer surrounding the cell membrane
C. A thick layer of mycolic acids
D. A thin layer of peptidoglycan

A

C. A thick layer of mycolic acids

17
Q

Athlete’s foot is an example of a
A. superficial parasitic infection.
B. protozoal infection.
C. superficial fungal infection.
D. hypersensitivity reaction.

A

C. superficial fungal infection.

18
Q

oxoplasma gondii requires the following for reproduction ( definitive host)
A. a cat
B. a fish
C. a mouse
D. a dog

A

A. a cat

19
Q

The Staphylococcus aureus toxins are
A. neurotoxins.
B. superantigen enterotoxins.
C. endotoxins
D. superantigen endotoxins

A

B. superantigen enterotoxins.

20
Q

Lyme disease is found across the United States, but is most common in the southwest.

T/F

A

F

21
Q

In bubonic plague, buboes are swellings formed in the lymph nodes and filled with
A. Clostridium tetani.
B. Yersinia pestis.
C. Xenopsylla cheopis.
D. Rickettsia prowazekii.

A

B. Yersinia pestis.

22
Q

Animal diseases transmissible to humans are known as
A. zoonoses.
B. ferals.
C. vectors.
D. radicals.

A

A. zoonoses.

23
Q

The CD4 molecule is
A. a cell-surface protein that allows HIV to infect a cell.
B. an HIV surface glycoprotein that is found only on T-cytotoxic cells.
C. none of the answers are correct
D. an HIV surface glycoprotein.

A

A. a cell-surface protein that allows HIV to infect a cell.

24
Q

Pus formation in skin lesions caused by Staphylococcus aureus infections is in part due to production of
A. catalase.
B. leukocidin.
C. coagulase.
D. hemolysins.

A

B. leukocidin.

25
Q

Rubella (German measles) is caused by a paramyxovirus like measles but is more severed than the measles.

T/F

A

F

26
Q

At approximately what temperature are most household freezers kept?
A. -80°C
B. 4°C
C. -20°C
D. 0°C

A

C. -20°C

27
Q

Blanching, a treatment with steam heat for 3 to 5 minutes:
A. destroys many enzymes in food and prevents further cellular metabolism.
B. kills bacteria by subjecting them to high heat.
C. is the loss of color in foods due to the growth of contaminating bacteria.
D. is a form of freezer burn.

A

A. destroys many enzymes in food and prevents further cellular metabolism.

28
Q

The initial infective stage of the malarial parasite is the
A. sporozoite.
B. merozoite.
C. schizont.
D. hypnozoite.

A

A. sporozoite.

29
Q

Tuberculoid Hansen’s disease is caused by the pathogen
A. Listeria monocytogenes.
B. Mycobacterium tuberculosis.
C. Mycobacterium leprae.
D. either Mycobacterium leprae or Mycobacterium tuberculosis.

A

C. Mycobacterium leprae.

30
Q

The presence of specific ________ signals that a given water source might be contaminated with pathogens.
A. Exotoxins
B. indicator microorganisms
C. endotoxins
D. chemical compounds

A

B. indicator microorganisms

31
Q

Large airborne bacterial particles settle first in the upper respiratory tract and the smaller ones later; only particles smaller than about 3 μM travel as far as the bronchioles in the lower respiratory tract.

T/F

A

T

32
Q

HAART stands for Highly Active Anti-Retroviral Therapy that is used in treating patients infected with COVID-19.

T/F

A

F

33
Q

An infection from swimming in warm, soil-contaminated natural water sources (lake) is due the free-living amoeba__.
A. Naegleria fowleri
B. Balantidium coli
C. Giardia intestinalis
D. Trichomonas vaginalis

A

A. Naegleria fowleri

34
Q

“Bloodborne hepatitis” is caused by infection with hepatitis ________ virus.
A. B
B. A
C. E
D. C

A

A. B

35
Q

The primary disease reservoir for plague is
A. fleas.
B. mosquitoes.
C. humans.
D. rats.

A

D. rats.

cmb 211 (8 decks)

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