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Bacte Lec (Overview) [Prelims 1] > 5.2.1 Erysipelothrix rhusiopathiae > Flashcards

5.2.1 Erysipelothrix rhusiopathiae Flashcards

1
Q

What are the characteristics of Erysipelothrix rhusiopathiae?

A

Non-spore forming
Pleomorphic
H2S producer
Occupational associated disease
Facultative anerobe

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2
Q

How pleomorphic does in E. rhusiopathiae

A

change of morphology due to prolonged incubation in BAP

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3
Q

Why does E. rhusiopathiae occupational associated disease?

A

Poultry that commonly infects butchers

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4
Q

What happen to TSI if E. rhusiopathiae was in it?

A

Creates blackening

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5
Q

What are the Virulence factor for E. rhusiopathiae?

A

Capsule

Neruaminidase
Hyaluronidase
Surface proteins

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6
Q

What is the MOT for E. rhusiopathiae?

A

Cuts or scratches (Direct contact)

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7
Q

What are the 3 categories of human infection for E. rhusiopathiae?

A

Erysipeloid

Septicemia (often associated with endocarditis)

Diffuse cutaneous infection

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8
Q

Erysipeloid is also known as ?

A

Rosenbach Disease

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9
Q

Described as butcher’s cut or diamond cut

A

Erysipeloid / Rosenbach disease

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10
Q

What is the common description for Erysipeloid?

A

Bubble finger or notorious edema

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11
Q

Erysipelois is commonly found in what part of the body?

A

Meat handler’s hand

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12
Q

What is the description for erysipeloid that has a lesion in the skin of the infected pig?

A

Diamond shaped

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13
Q

What is the microscopical characteristics of E. rhusiopathiae

A

Thin
Rod
Filamentous
Gram positive (Maybe variable)

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14
Q

Why is E. rhusiopathiae is gram variable?

A

they are easy to decolorize

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15
Q

How many hrs can E. rhusiopathiae acquire filamentous shape?

A

72 hrs

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16
Q

What is the cultural characteristics of E. rhusiopathiae?

A

Requires 5% CO2 at 35C

Rough Colonies
- Large
- Rough
- Curled
- Irregular edges

Smooth Colonies
- Small
- Smooth
- Transparent

Alpha hemolytic (Prolonged incubation [24 hrs])

17
Q

What is use to identify E. rhusiopathiae?

A

TSI

18
Q

What are the components of TSI?

A

Sucrose
Lactose
glucose

19
Q

What is the characteristics of E. rhusiopathiae in TSI?

A

Brush-like pattern at 22C

Blackening

20
Q

Is E. rhusiopathiae the only gram positive bacili produces H2s?

A

TRUE

21
Q

TSI is commonly use for what organims?

A

Enterobacteriaceae

22
Q

What is the treatment for E. rhusiopathiae

A

Penicillin

Bacte Lec (Overview) [Prelims 1] (34 decks)

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