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MLS(ASCP) - Microbiology > Microbiology > Flashcards

Microbiology Flashcards

1
Q

List 2 plating media would you use to identify and isolate bacterial conjunctivitis:

What kind of stain would you perform?

A

Plating media:

  1. Chocolate agar
  2. 5% SBA

Gram Stain

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2
Q

List the agent that causes human monocytic ehrlichiosis (HME):

A

Ehrlichia chaffeensis

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3
Q

List the agent that causes Rocky Mountain spotted fever (RMSF):

A

Rickettsia rickettsii

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4
Q

What is the vector for Rocky Mountain spotted fever?

A

Ticks

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5
Q

List the causative agent for Lyme disease:

A

Borrelia burgdorferi

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6
Q

What is the causative agent of genital warts?

A

HPV - human papillomavirus

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7
Q

List the causative agent of Chancroid:

A

Haemophilus ducreyi

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8
Q

List the causative agent of syphilis:

A

Treponema pallidum

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9
Q

Refer to the photo below.

List the disease caused by this organism:

A

Trichomonas

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10
Q

Refer to the photo below:

What organism is causing the white coating on the patient’s tongue?

A

Candida albicans

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11
Q

What is the most common organism that causes nongonoccoal urethritis (NGU)?

A

Chlamydia trachomatis

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12
Q

Which test is the gold standard in diagnosing bacterial meningitis?

A

CSF culture

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13
Q

List any 3 nonviral causes acute meningoencephalitis:

A
  1. L. monocytogenes
  2. Ricketttsia
  3. Bartonella
  4. Mycoplasma
  5. B. burgdorferi
  6. T. gondii
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14
Q

List 2 spirochetes associated with CNS infections:

A
  1. T. pallidum
  2. B. burgdorferi
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15
Q

List 3 common organisms that cause acute meningitis:

A
  1. N. meningitidis
  2. H. influenzae
  3. L. monocytogenes
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16
Q

Refer to the photo below:

What organism is shown here growing on hektoen enteric agar?

A

Salmonella spp.

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17
Q

List 3 late or slow lactose-fermenting organisms commonly isolated from the GI tract that initially appear colorless and transition to light pink on Maconkey agar:

A
  1. Serratia spp
  2. Citrobacter spp
  3. Hafnia spp
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18
Q

Refer to the photo below:

What is causing the black color of the cultured organism on this XLD agar media?

A

H2S production from Salmonella spp.

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19
Q

Refer to the photo below:

What organism do you suspect is growing in this XLD agar media?

A

Shigella spp.

Does not ferment any sugars and appear red or clear on XLD.

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20
Q

List media that is highly selective at promoting growth of Vibrio spp.:

A

TCBS - Thiosulfate-citrate-bile salts-sucrose agar

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21
Q

List media that is highly selective at promoting growth of C. difficile:

A

CCFA - cycloserine-cefoxitin-fructose agar

22
Q

List the organism commonly associated with peptic ulcer disease:

A

Helicobacter pylori

23
Q

List the gram (+), anaerobic, spore and toxin producing organism which is commonly associated with nosocomial antibiotic-associated diarrhea.

A

Clostridium difficile

24
Q

Jock itch and ringworm are cause by this organism:

A

Tinea spp.

25
Q

List 2 acid fast stains used to identify mycobacteria:

A
  1. Ziehl-Neelsen
  2. Kinyoun
26
Q

List the causative agent for whooping cough:

A

Bordatella pertussis

27
Q

List the condition in which prions are the causative agent.

A

Kuru or transmissible spongiform encephalopathies (TSE), CJD

28
Q

Individuals with Hepatitis D infection are concurrently infected with an additional virus:

A

Hepatitis B (HBV)

29
Q

List hepatitis viruses that most likely result in chronic infection:

A

HBV

HCV

30
Q

How is Hepatitis A transmitted?

A

Fecal - oral route

31
Q

Which viral category is responsible for causing colds?

A

Rhinoviruses

32
Q

Which viral category is responsible for causing AIDS?

A

Retroviridae

33
Q

Koplik spots are symptoms associated with which viral disease?

A

Measles

34
Q

List a common virus implicated in causing croup, bronchitis, and interstitial pneumonia.

A

RSV - respiratory syncytical virus

35
Q

Refer to the photo below.

Identify the worm indicated by the arrow:

A

Strongyloides

36
Q

Refer to the photo below:

Identify the type of ova pictured at the arrow:

A

Hookworm ova

37
Q

Refer to the photo below:

Identify the type of ova pictured at the arrow:

A

Ascaris lumbricoides ova

38
Q

Refer to the photo below:

Identify the type of ova pictured at the arrow:

A

Trichuris trichiura ova

39
Q

Refer to the photo below:

Identify the type of ova pictured at the arrow:

A

Paragonimus westermani egg

40
Q

Refer to the photo below:

Identify the type of ova pictured at the arrow.

A

Clonorchis sinesis ova

41
Q

Refer to the photo below:

This test is diagnostic for which bacteria spp?

A

Corynebacterium diphtheriae

42
Q

Refer to the photo below:

This test is diagnostic for which bacteria spp?

A

Listeria

43
Q

Refer to the photo below:

This test is diagnostic for which bacteria spp?

A

Group B β-hemolytic streptococci

44
Q

Refer to the photo below:

The wagonwheel appearance of the white colonies is characteristic of:

A

Moraxella spp.

45
Q

Refer to the diagram below:

This test is used to identify which bacterium?

A

H. influenzae

46
Q

A selective media containing sheep rbcs and phenylethyl alcohol that is used to supress gram (-) bacilli is called:

A

PEA agar

47
Q

Bacteroides Bile esculin (BBE) agar when cultured and incubated anaerobically will often grow which bacterium?

A

B. fragilis

48
Q

JEMBEC plates with a characteristic “Z” growth pattern are used in the identification of the following bacterium:

A

N. gonorrhoeae

49
Q

Refer to the photo of a urease test below:

Which tube is considered positive?

A

Pink tube

50
Q

Define syncytial:

A

Multinucleate cells

51
Q

Define median infectious dose (ID50):

A

Minimum number of organisms required to cause diarrhea in 50% of people exposed.

52
Q

List the E.coli strain responsible for enterohemorrhagic E. coli that often develops into hemolytic uremic syndrome (HUS):

A

O157:H7

MLS(ASCP) - Microbiology (1 decks)

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