Erysipelothrix Flashcards Preview

RUSVM Bacteriology Gram Positives > Erysipelothrix > Flashcards

Flashcards in Erysipelothrix Deck (19)
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1

Erysipelothrix - Describing statement

Gram +, Coagulase +, Catalase/Oxidase Negative, Non-spore forming, , *slender rods*, *H2S producers in TSI slant* . Resistant to high salt concentrations & wide temp range

2

Erysipelothrix - virulence factors

Capsule & Neuraminidase (sialic acid cleavage-->thrombus-->adhesion)

3

Erysipelothrix- Pathogenesis

Attachment--> vascular damage & hyaline thrombus formation--> resistant to phagocytosis & survive inside if are engulfed (capsule)

4

Erysipelothrix in swine

"Diamond Skin Disease!" Pigs < 3 years are least susceptible (mom's and own natural defenses) - Septic/acute form - Chronic form

5

When I say Diamond Skin disease or rhomboid patches on skin, you say...

Erysipelas in swine - E. rhusiopathiae

6

Septic form of Erysipelas in swine

Acute, high mortality rates if untreated

7

Chronic form of Erysipelas in swine

Significant Industry impact - Vegetative endocarditis - Arthritis, stiff gait - Abortion (heart, joints, abort!)

8

When I say vegetative endocarditis & arthritis & abortion in swine, you say...

Erysepelothrix rhysiopathiae - Chronic form

9

Erysipelas in birds

Especially Turkeys - Septicemia - Cyanotic! (blue) - Swollen snood (characteristic) - Chronic (vegetative endocarditis & arthritis)

10

If I say swollen snood on turkey, you say...

Erisepelas!

11

If I say vegetative endocarditis & arthritis on a turkey, you say...

Erisepelas!

12

Case study: Heifer with vegetative endocarditis

Erisepelas in a heifer!

13

Erysipelas in sheep

Polyarthritis

14

Erysipelas in dog

Endocarditis & arthritis

15

Erysipelas in dolphins

Septicemia & urticaria

16

Erysipelas in humans

Skin & subQ infection, common in animal & fish handlers

17

Describe the appearance of colonies on blood agar at 24 and 48hrs in Erysipelothrix rhusiopathiae

24 h: pin point colonies, no hemolysis
- 48hr: green zone of incomplete/alpha hemolysis

18

What happens in a TSI agar slant test with Erysipelothrix rhusiopathiae

H2S production !

19

Case Study- Vegetative endocarditis in heifer, in right AV valve. Suspect multiple septic thrombi caused infarction in the brain leading to ataxia & altered behavior

Erysipelothrix in a heifer