Ery

Question 1

Which species doe E. rhusiopathiae affect?

Answer 1

1. Swine
2. Turkey
3. Humans

Question 2

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

Answer 2

E. rhusiopathiae

Question 3

What does E. rhusiopathiae look like microscopically?

Answer 3

Gram + rod

Question 4

What does E. rhusiopathiae look like in culture?

Answer 4

• Tiny, clear colonies
• Alpha hemolysis
• Slow growing

Question 5

What is this organism?

Answer 5

E. rhusipathiae

Question 6

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

1. Catalase
2. H2S
3. Motility

Answer 6

1. Negative
2. Positive
3. “Test tube brush motility”

Question 7

What is the typical habitat of E. rhusiopathiae?

Answer 7

Tonsils of about 30-50% of swine

Excreted in urine and feces

In soil for months

Question 8

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

Answer 8

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

Question 9

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

Answer 9

Thrombi occlude the blood supply to areas of the skin

These areas become necrotic

Question 10

How might a turkey be infected with Erysipelothrix rhusiopathiae?

Answer 10

Fight wounds –> Septicemia

Question 11

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

Answer 11

Chronic Erysipelothrix rhusiopathiae

Question 12

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

Answer 12

Swollen head

Question 13

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

Answer 13

Wounds

Question 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?

Answer 14

Erysipelothrix rhusiopathiae

Question 15

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

Answer 15

Penicillin

Question 16

What does Corynebacterium look like microscopically?

Answer 16

Gram + rod

Club shaped

Palisades (parallel groups)

Question 17

Ture or false:

Corynebacterium form spores.

Answer 17

FALSE

Question 18

What are the following test results with Corynebacterium renale?

1. Catalase
2. Urease
3. Hemolysis

Answer 18

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

Question 19

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

Answer 19

Pyelonephritis

Question 20

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

Answer 20

Pizzle rot

Question 21

What is the NORMAL habitat of Corynebacterium renale?

Answer 21

Urethra & prepuce

Cattle & sheep

Question 22

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

Answer 22

Penicillin

Question 23

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

Answer 23

• 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

Question 24

There are 2 biovars of Corynebacterium pseudotuberculosis.

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

Answer 24

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

*** Both cause abscesses in cattle ***

Question 25

What is the difference between biovars in biochemical testing?

Answer 25

Biovar ovis : nitrate negative Biovar equi : nitrate positive

Question 26

What is this organism?

Answer 26

Corynebacterium pseudotuberculosis

Question 27

True or False: 1. Corynebacterium pseudotuberculosis is alpha hemolytic. 2. Corynebacterium pseudotuberculosis is urease negative.

Answer 27

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

Question 28

There are 2 toxins for C. pseudotuberculosis. 1. What are they? 2. What are their functions/characteristics?

Answer 28

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

Question 29

What is the normal habitat for C. pseudotuberculosis?

Answer 29

Skin Sheep & goats

Question 30

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

Answer 30

1. Falcultative intracellular parasite 2. Anaerobic environment

Question 31

How might Corynebacterium pseudotuberculosis affect a horse?

Answer 31

Biovar equi can cause ulcerative lymphangitis Infection starts as a wound or abscess and affects the lymph nodes of the legs

Question 32

What type of immunization is available?

Answer 32

Bacterin-toxoid | (Poor efficacy @ 40%)

Question 33

What disease processes can Rhodococcus equi cause?

Answer 33

Enteritis Bronchopneumonia Arthritis

Question 34

What is the hemolytic pattern of R. equi?

Answer 34

Non-hemolytic

Question 35

Explain the colony morphology of R. equi

Answer 35

Moist Mucoid Flowing

Question 36

What is the morphology of R. equi microscopically?

Answer 36

Large rod Pleomorphic - ranging to cocci Gram +

Question 37

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

Answer 37

1. Rhodococcus equi 2. Urease positive

Question 38

What is the natural habitat of Rhodococcus equi?

Answer 38

Common commensal of the horse GI tract - especially in YOUNG animals Soil - especially in equine pastures

Question 39

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

Answer 39

Lymph nodes

Question 40

What is your treatment of choice for Rhodococcus equi?

Answer 40

Erythromycin (long acting macrolid) + Rifampin

Question 41

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

Answer 41

Anaerobic environment

Question 42

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

Answer 42

Pyelonephritis

Question 43

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

Answer 43

1. Truperella pyogenes 2. Tappering tails on both ends

Question 44

Trueperella pyogenes test results: 1. Catalase 2. Litmus 3. Casein agar

Answer 44

1. Negative 2. ACP 3. Digestion

Question 45

What is the morphology of Trueperella pyogenes microscopically?

Answer 45

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

Question 46

What is the colony morphology of Trueperella pyogenes?

Answer 46

1. Small 2. Beta hemolysis