Lesson 5a: Erysipelothrix rhusiopathiae Flashcards

1
Q

Erysipelothrix rhusiopathiae causes:

A
  1. swine erysipelas
  2. turkey erysipelas
  3. polyarthritis in lambs
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

infection is usually aquired by ingestion of material contaminated by ?

A

pig faeces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are the virulence factor of erysipelothrix rhusiopathiae?

A
  1. capsules
  2. enzymes
  3. surface proteins
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Localization of the bacteria in ______ and on _________ during haematogenous spread accounts for the development of chronic lesions at these sites.

A

joint synovia & heart valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

________ are rarely isolated from chronically affected joints.

A

E. rhusiopathiae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

also known as diamond skin disease, subclinical infected carrier pigs are the main reservoir of this infection, pigs w/ acute disease excrete large number of organisms in faeces.

A

Swine erysipelas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

organism of swine erysipelas, are also excreted in the ?

A

urine, saliva, & nasal discharge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

protection against infection of swine erysipelas are due to?

A
  1. maternally-derived antibodies (pigs under 3 months old)
  2. exposure to strains of low virulence (pigs over 3 years old)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

to form of acute form in erysipelothrix rhusiopathiae

A
  1. septicaemic form
  2. cutanenous form
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

in this form incubation period of 2 to 3 days.high mortality rate and abortion may occur to pregnant sows

A

Septicaemic form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

in septicaemic form pig are showing this behavior:

A
  1. febrile
  2. depressed
  3. walk w/ a stiff
  4. stilted gait or remain recumbent
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

______ or diamond skin form, w/ less severe systemic signs & lower mortality rates, pigs are febrile & cutaneous lesion characterized to diamond-shape erythematous plaques

A

cutaneous form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

this form is common in older pigs & present stiffness, lameness or reluctant to bear weight on affected limbs.

A

Arthritic form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

this is the least common form, with wart-like thrombotic masses usually on the mitral valves, affected animals are asymptomatic but some developed Congestive heart failure or die suddenly if stressed by physical exertion or by pregnancy..

A

Vegetative endocarditis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

diagnosis of swine erysipelas;

A

diamond-shaped skin lesions are pathognomonic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

samples to be collected:

A
  1. blood for heamoculture
  2. post-mortem specimen of liver, spleen, heart valves or synovial tissue.
17
Q

what is laboratory technique use in s. erysipelas

A

Gram staining

18
Q

Bacterial culture isolation by s. erysipelas

A

Blood agar & MacConkey agar plates

19
Q

this test are not applicable for diagnosis in swine erysipelas ?

A

Serological test

20
Q

molecular detection used by s. erysipelas?

21
Q

treatment for s. erysipelas?

A

acute form: penicillin & tetracycline
chronic form; antibiotic therapy is ineffective

22
Q

control of s. erysipelas

A
  1. strict hygiene & management practices
  2. culling or isolation of affected pigs
  3. vaccines are available but should not be administered
23
Q

important disease in turkeys worldwide, can be excreted in semen & caused death to turkey, hens 4-5 days ff. artificial insemination.It’s septicaemic w/ high mortality rates.

A

Erysipelas in fowl

24
Q

what is the characteristic of erysipelas in fowl:

A

dark-coloured, swollen snoods

25
post-mortem findings of erysipelas in fowls?
enlarged friable live & spleen
26
chronically affected birds of ersipelas fowl may exhibit?
1. arthritis 2. vegetative endocarditis 3. gradually lose weight 4. they become emaciated
27
vaccination w/ an inactive vaccine stimulates?
protective immunity
28
this disease can cause outbreaks of severe disease occasionally, with reported moratality rates up to 50%
Erysipelas in chicken
29
this can cause non-suppurative polyarthritis in lambs,
infection in sheeps
30
entry of infection of chickens may thru?
1. navel 2. docking 3. castrations
31
the organism may contaminate dipping solution that can infect older lambs & adult sheeps thru skin aberations in the hoof region manifested by ?
cellulitis or lameness