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Fall 22: micro > Quiz questions > Flashcards

Quiz questions Flashcards

1
Q
A

gram negative

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2
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A
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3
Q
A
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4
Q
A

oppurtunistic

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5
Q
A
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6
Q
A

no

type of lincosamide → has NO urinary penetration, no Gram negative coverage, good anaerobic activity

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7
Q
A

streptococcus equi subspecies equi

(gram + cocci chain)

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8
Q
A

group B → S. agalactiae

Group D→ enterococcus

Group G: S. canis

Group R,S, or T: S. suis

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9
Q

Fluoroquinolones are associated with which of the following in dogs?
A. Cartilage defects when administered to puppies

B. Retinal degeneration when administered at high doses

C. Immune-mediated disease in Dobermans

D. Peripheral neuropathy with extended courses

A

A. Cartilage defects when administered to puppies

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10
Q

Fluoroquinolones are concentration dependent drugs. If you had an organism that tested “I” (intermediate) to an FQ but it was the drug you wanted to use, then you should:
A. Increase your dose

B. Increase frequency of administration

C. Decrease your dose

D. Decrease frequency of administration.

A

A. Increase your dose

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11
Q

TM S is made up of two antimicrobial drugs (Trimethoprim and Sulfamethoxazole). Both drugs target a different part of the ___________ pathway. Both drugs are ______________ alone but combined their activity is ______________.

A

folic acid

bacteriostatic

bactericidal

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12
Q

TMS has activity against all of the following except:
A. Gram positive aerobes

B. Gram negative aerobes

C. Anaerobes

A

anaerobes

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13
Q

The morning after they arrive, you are called to check on Patsy who appears to be lethargic and has mucopurulent nasal discharge. Based on the history you make a diagnosis of “shipping fever.” Which 3 of the following organisms top your list as the potential bacterial causes?

Pasteurella multocida

Actinobacillus pleuropneumoniae

Capnocytophaga canimorsus

Mannheimia haemolytica

Actinobacillus lignieresii

Histophilus somni

Haemophilus influenzae

A

Pasteurella multocida

Mannheimia haemolytica

Histophilus somni

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14
Q

You administer a dose of gamithromycin which is a macrolide antibiotic labelled for shipping fever (specifically Pastuerella multocida, Histophilus somni and Mannhemia haemolytica).

What is the mechanism of action of gamithromycin?

A

Protein synthesis inhibition

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15
Q

When you explain the potential outcomes and prognoses to the owner you make sure to mention the worst outcome of Histophilus somni infection which is ____________(use full term).

A

Thromboembolic meningoencephalitis,

Infectious thromboembolic meningoencephalitis

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16
Q

The next morning it is obvious that Patsy is feeling better but now Mandy is squinting in both of her eyes. She has bilateral conjunctivitis (“Pink eye”) and you suspect the most likely pathogen is ___

A

Moraxella bovis

17
Q

Just to top it all off- Hilda appears to be dropping feed. You examine her mouth and find that she had a large bony protrusion in her lower left mandible. You are Hilda may have an infection with which of the following?

Actinomyces bovis

Actinobacillus lignierensii

A

Actinomyces bovis

18
Q

ou noted in your exam of “ReBuck McEntire” that the left inguinal lymph node was abscessed. You suspect “CL.” What is the pathogen that causes this disease in goats?

Spelling counts!

A

Corynebacterium pseudotuberculosis

19
Q

You contact the pathologist to run a culture for Corynebacterium pseudotuberculosis on any lesions from “Billy Eilish”. In response, the pathologist sends you the following image in an email and states following Gram stain of the necropurulent foci in the liver “I saw Gram positive bacilli but rest assured they were non-sporulated.”

What organism, that causes acute death in ruminants, is the pathologist ruling out with this statement?

Spelling counts!

A

Bacillus anthracis

20
Q

The culture for Billy Eilish comes back as positive for Listeria monocytogenes. The pathologist explains that occasionally listeriosis in small ruminants can cause a fatal septicemia that presents without the classic ________ clinical signs.

Neurologic

Respiratory

Dermatologic

Musculoskeletal

A
21
Q

You are concerned to find out the goat was diagnosed with since these goats routinely interact with the public during the yoga sessions. Describe a few concerns you have to Karen below (graded on completion).

A

listeria is zoonotic

listeria can grow at temperatures 0-42.

can survive at low pH and high NaCl

can cause meningitis, bacteremia, and abortion

22
Q

You explain to Karen that she should no longer let her goats participate in her Yoga classes as Listeria is zoonotic and that you are going to contact public health so they can give advice to susceptible people (especially pregnant women).

You also confirmed that Reba does in fact have caseous lymphadenitis secondary to C. pseudotuberculosis. You advise Karen that it is likely that many of the goats are infected and infection is often lifelong.

Which of the following would be most effective in control of C. pseudotuberculosis?

Treatment with antibiotics

Surgical excision of affected lymph nodes

Isolation of new or young animals away from affected animals

A

Isolation of new or young animals away from affected animals

23
Q

A punch biopsy of the digit was performed. Histopathologic examination revealed dermal and subcutaneous coalescing nodular aggregates of granulomatous inflammation including neutrophils, epithelioid macrophages and multinucleated giant cells centered around large black-brown pigmented granular bodies. (Figure 2A, B) The Gram stain highlighted colonies of gram positive filamentous rods (Figure 2C).

Based on the Gram stain results you believe the most likely agents of the infection are either Actinomyces or Nocardia. Which of the following culture methodologies should you request from the microbiology lab?

Fungal Culture

Mycobacterial culture

Aerobic bacterial culture

Anaerobic bacterial culture

A

Aerobic bacterial culture

Anaerobic bacterial culture

24
Q

You also ask the pathologist to perform an acid fast stain. Which of the following genera will stain positive or partially acid-fast?

Erysipelothrix

Corynebacterium

Listeria

Streptococcus

Mycoplasma

Staphylococcus

Bacillus

Nocardia

Actinomyces

Mycobacterium

A

acid fast +

mycobacterium

nocardia

rhodocococcus

25
Q

Seven days later the microbiology lab identified an organism called Amycolatopsis spp. growing from the lesion. Gram stain is consistent with the organism found upon histopathology. This is likely an environmental organism (“saprophyte”) causing a rare infection in an immunocompromised host. Amycolatopsis in veterinary medicine has also been associated with metritis in mares. Which of the following organisms is a common agent of equine metritis?

R. equi

S. equi subsp. equi

S. equi subsp. zooepidemicus

Corynebacterium pseudotuberculosis

A

Strep. equi subsp. zooepidemicus

26
Q

There is limited treatment options based on human and equine case reports in the literature. It seems like the best options would be doxycycline (which has already failed in this patient) and TMS. You are concerned about the side effects of long term administration of TMS which include which of the following?

Keratoconjunctivitis sicca

Enamel hypoplasia

Retinal degeneration

Immune-mediated blood disorders (example ITP).

Cartilage defects

Neurologic side effects

Esophageal strictures

A

Keratoconjunctivitis sicca

Immune-mediated blood disorders (example ITP).

27
Q

which one is Escherichia

which one in enterococcus

A

Escherichia → B

enterococcus → A

28
Q

You open it up and notice that there is a pig ear treat unwrapped in the bag.

AHA!

What genus of bacterial pathogen is commonly associated with pig ear dog treats?

A

Salmonella

29
Q

You have learned your lesson about assuming and you call the lab and ask to “STAT” the Salmonella PCR based on your suspicions. The microbiologist assures you that you will have results in a couple of hours. You begin to make your therapy plan for the animals based on the assumed diagnosis of salmonellosis and you plan on prescribing:

Metronidazole

No antibiotics

Enrofloxacin

TMS

Amoxicillin

A

No antibiotics

30
Q

Why might this dog have tested negative for the salmonella but still have clinical signs?

A

intermittent shedding

31
Q

You receive the final results of the panel on the dog that did not eat the pig ear. The only positive on their panel was for the stx1 gene.

Which pathogen is likely in the feces of this dog and its associated source?

Staphylococcus aureus…….. Food contaminated by human handling

Escherchia coli O157:H7….. raw/undercooked beef product

Listeria monocytogenes….uncooked hotdogs or other ready-to-eat meats

Campylobacter jejuni……. raw/undercooked poultry product

Yersinia enterocolitica…… raw/undercooked pork product

A

Escherchia coli O157:H7….. raw/undercooked beef product

32
Q
A

Fall 22: micro (25 decks)

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