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RUSVM Bacteriology Gram Positives > Erysipelothrix > Flashcards

Erysipelothrix Flashcards

1
Q

Erysipelothrix - Describing statement

A

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

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2
Q

Erysipelothrix - virulence factors

A

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

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3
Q

Erysipelothrix- Pathogenesis

A

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

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4
Q

Erysipelothrix in swine

A

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

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5
Q

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

A

Erysipelas in swine - E. rhusiopathiae

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6
Q

Septic form of Erysipelas in swine

A

Acute, high mortality rates if untreated

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7
Q

Chronic form of Erysipelas in swine

A

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

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8
Q

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

A

Erysepelothrix rhysiopathiae - Chronic form

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9
Q

Erysipelas in birds

A

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

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10
Q

If I say swollen snood on turkey, you say…

A

Erisepelas!

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11
Q

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

A

Erisepelas!

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12
Q

Case study: Heifer with vegetative endocarditis

A

Erisepelas in a heifer!

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13
Q

Erysipelas in sheep

A

Polyarthritis

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14
Q

Erysipelas in dog

A

Endocarditis & arthritis

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15
Q

Erysipelas in dolphins

A

Septicemia & urticaria

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16
Q

Erysipelas in humans

A

Skin & subQ infection, common in animal & fish handlers

17
Q

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

A

24 h: pin point colonies, no hemolysis

- 48hr: green zone of incomplete/alpha hemolysis

18
Q

What happens in a TSI agar slant test with Erysipelothrix rhusiopathiae

A

H2S production !

19
Q

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

A

Erysipelothrix in a heifer

RUSVM Bacteriology Gram Positives (13 decks)

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