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Bacteriology & Mycology > Erysipelothrix spp > Flashcards

Erysipelothrix spp Flashcards

1
Q

what is the main Erysipelothrix spp. to be concerned about

A

E. rhusiopathiae

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2
Q

what type of bacteria is E. rhusiopathiae

A

gram +
non-spore forming
alpha hemolysis
rod

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3
Q

True or False:

E. rhusiopathiae is pathogenic

A

true

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4
Q

what is a E. rhusiopathiae infection called in swine

A

erysipelas

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5
Q

where does an erysipelas infection occur

A

superficial layer of the skin

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6
Q

how is erysipelas characterized

A

raised, well-defined, red rash on the skin

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7
Q

what is the primary reservoir of E. rhusiopathiae

A

swine

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8
Q

how can one come in contact with E. rhusiopathiae

A

sewage or ground contaminated with feces

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9
Q

where is it common to E. rhusiopathiae

A

fish skin

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10
Q

True or False:

E. rhusiopathiae survives for a long time in the environment

A

FALSE
this bacteria wants to be within a host

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11
Q

what is the mode of infection for erysipelas

A

ingestion
scratches and wounds

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12
Q

what are the virulence factors of erysipelas

A

capsule - acidic polysaccharide
surface proteins
hyaluronidase
neuraminidase
type III hypersensitivity = arthristis

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13
Q

what age group of pigs are most susceptible

A

3 month to 3 yrs.

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14
Q

what is the most common / easiest way for pigs to become infected

A

orally
(fish meal, contaminated feed/ water)
bug bites

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15
Q

what are the forms erysipelas can take in pigs

A

septicemic
skin
chronic

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16
Q

what type of infection is the septicemic type of erysipelas

A

acute in young pigs

17
Q

what are the clinical signs of septicemic erysipelas

A

fever
red/purple skin patches
death (if left untreated)

18
Q

what are the clinical signs of the skin form of erysipelas

A

diamond shaped red, raised area
necrosis of skin
scabs

19
Q

what are the clinical signs of the chronic form of erysipelas

A

arthritis
endocarditis

20
Q

when do skin lesions of erysipelas appear

A

2-3 days and disappear 4 - 7 days

21
Q

explain the intensity of the lesions caused by erysipelas and their prognosis

A

light pink - purple = recover
dark purple to red = death

22
Q

how does erysipelas present in sheep and cattle

A

polyarthritis symptoms

23
Q

how does erysipelas present in turkeys

A

more often in males
skin injuries
hemorrhagic lesions

24
Q

how are turkeys infected with erysipelas treated

A

penicillin IM injection
flock vaccination

25
Q

what is the prognosis of erysipelas in swine

A

time sensitive treatment needed
- penicillin within 24- 36 hours of infection = good recovery

Bacteriology & Mycology (15 decks)

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