Ery Flashcards Preview

Microbiology 386 > Ery > Flashcards

Flashcards in Ery Deck (47):
1

Which species doe E. rhusiopathiae affect?

  1. Swine
  2. Turkey
  3. Humans

2

Which gram + organism produces a black line in the kligler's medium?

Q image thumb

E. rhusiopathiae

3

What does E. rhusiopathiae look like microscopically?

Gram + rod

4

What does E. rhusiopathiae look like in culture?

  • Tiny, clear colonies
  • Alpha hemolysis
  • Slow growing

5

What is this organism?

Q image thumb

E. rhusipathiae

6

What test results would lead you to believe an unknown is Erysipelothrix rhusiopathiae?

  1. Catalase
  2. H2S
  3. Motility

  1. Negative
  2. Positive
  3. "Test tube brush motility"

A image thumb
7

What is the typical habitat of E. rhusiopathiae?

Tonsils of about 30-50% of swine

Excreted in urine and feces

In soil for months

8

There are 3 manifestation of E. rhusiopathiae in swine.  What are they?

  1. Acute form
    • Septicemia
    • Lameness
    • Fever
    • Death
  2. Skin form
    • Diamond skin disease
  3. Chronic form
    • Endocarditis
    • Arthritis

9

What causes the diamond skin disease to show up in this disease?

Thrombi occlude the blood supply to areas of the skin 

These areas become necrotic

10

How might a turkey be infected with Erysipelothrix rhusiopathiae?

Fight wounds --> Septicemia

11

  1. What was this pig's condition called?
  2. What other abnormal conditions might this pig suffer from?

Q image thumb

Chronic Erysipelothrix rhusiopathiae

12

What symptom might a turkey have infected with E. rhusiophathiae?

Swollen head

A image thumb
13

What is the most common entry point for an E. rhusiopathiae infection?

Wounds

14

If a fishman recalls being stuck by a fish and later develops a focal, burning, itchy lesion on his hand, what organism might you be concerned about?

Erysipelothrix rhusiopathiae

15

What might be your go-to drug for an pig infected with Ery?

Penicillin

16

What does Corynebacterium look like microscopically?

Gram + rod

Club shaped

Palisades (parallel groups)

A image thumb
17

Ture or false:

Corynebacterium form spores.

FALSE

18

What are the following test results with Corynebacterium renale?

  1. Catalase
  2. Urease
  3. Hemolysis

  1. Positive
  2. Positive (RAPID - WITHIN MINUTES!)
  3. Non-hemolytic

19

What problem(s) can Corynebacterium renale cause in cattle?

Pyelonephritis

20

What problem(s) can Corynebacterium renale cause in sheep?

Pizzle rot

21

What is the NORMAL habitat of Corynebacterium renale?

Urethra & prepuce

Cattle & sheep

22

What is your drug of choice in treating an infection of Corynebacterium renale?

Penicillin

23

Explain the pathogenesis of pizzle rot in a sheep infected with Corynebacterium renale

Q image thumb

  • Excessive protein in the diet
  • Leads to increased urea in the urine
  • C. renale breaks down urea into ammonia
  • Ammonia is irritating to the mucosa
  • Inflammation may cause blockage of urination

24

There are 2 biovars of Corynebacterium pseudotuberculosis.  

  1. What are they?
  2. What do they cause?

  1. Ovis
    • Caseous lymphadenitis
  2. Equi
    • Abscesses
    • Ulcerative lymphangitis

 

    *** Both cause abscesses in cattle ***

25

What is the difference between biovars in biochemical testing?

Biovar ovis : nitrate negative

Biovar equi : nitrate positive

26

What is this organism?

Q image thumb

Corynebacterium pseudotuberculosis

27

True or False:

  1. Corynebacterium pseudotuberculosis is alpha hemolytic.
  2. Corynebacterium pseudotuberculosis is urease negative.

  1. FALSE: narrow zone of BETA hemolysis
  2. FALSE: urease POSITIVE

28

There are 2 toxins for C. pseudotuberculosis.

  1. What are they?
  2. What are their functions/characteristics?

  1. Phospholipase D
    • Lethal
    • Weak hemolysin
    • Dermonecrotic
  2. Surface lipid
    • Toxic for phagocytes

29

What is the normal habitat for C. pseudotuberculosis?

Skin

Sheep & goats

30

  1. What type of parasite is C. pseudotuberculosis?
  2. What environmental condition does it prefer for optimal growth?

  1. Falcultative intracellular parasite
  2. Anaerobic environment

31

How might Corynebacterium pseudotuberculosis affect a horse?

Biovar equi can cause ulcerative lymphangitis

Infection starts as a wound or abscess and affects the lymph nodes of the legs

32

What type of immunization is available?

Bacterin-toxoid

(Poor efficacy @ 40%)

33

What disease processes can Rhodococcus equi cause?

Enteritis

Bronchopneumonia

Arthritis

34

What is the hemolytic pattern of R. equi?

Non-hemolytic

35

Explain the colony morphology of R. equi

Moist

Mucoid

Flowing

 

A image thumb
36

What is the morphology of R. equi microscopically?

Large rod

Pleomorphic - ranging to cocci

Gram +

37

  1. Of the organisms in this set of flascards, which one is illustrated?
  2. What is the urease test for this organism?

Q image thumb

  1. Rhodococcus equi
  2. Urease positive

38

What is the natural habitat of Rhodococcus equi?

Common commensal of the horse

GI tract - especially in YOUNG animals

Soil - especially in equine pastures

39

What might Rhodococcus equi be able to be isolated from an infected pig?

Lymph nodes

40

What is your treatment of choice for Rhodococcus equi?

Erythromycin (long acting macrolid) + Rifampin

41

What type of environment is optimal for Actinobaculum suis for growth?

Anaerobic environment

42

What type of disease process is associated with A. suis in pigs?

Pyelonephritis

43

  1. What is this organism?
  2. Which feature tells you this?

Q image thumb

  1. Truperella pyogenes
  2. Tappering tails on both ends

44

Trueperella pyogenes test results:

  1. Catalase
  2. Litmus
  3. Casein agar

  1. Negative
  2. ACP
  3. Digestion

45

What is the morphology of Trueperella pyogenes microscopically?

  1. Short rods
  2. Tapered ends (sometimes)
  3. Non-encapsulated
  4. Chinease letters

46

What is the colony morphology of Trueperella pyogenes?

  1. Small
  2. Beta hemolysis

47