Porcine skin disease Flashcards Preview

Food animal production > Porcine skin disease > Flashcards

Flashcards in Porcine skin disease Deck (37)
Loading flashcards...
1

What skin diseases cause cyanotic scabs?

1. Erysipelothrix rhusiopathiae
2. porcine dermatitis and nephropathy syndrome (PCV2)

2

What skin disease causes crusts, scales and grease?

exudative epidermatitis

3

What causes puriritic skin dz in pigs?

sarcoptic mange

4

What percentage of healthy swine are carriers of erysipelothrix rhusiopathiae?

30-50%

5

What is the epidemiology of erysipelothrix rhusiopathiae?

1. resistant to drying
2. susceptible to common disinfectants
3. remains viable for months in animal tissues
4. infected swine shed profusely

6

What is the susceptibility to erysipelothrix rhusiopathiae

passive antibody protective
all ages susceptible

7

What are the clinical signs of erysipelothrix rhusiopathiae?

1. found dead
2. pyrexia!!
3. diamond skin disease
widespread ischemic necrosis (severe)

8

What is an indication that a skin area will devleop ischemic necrosis?

pitting edema, piloerection

9

What can baby pigs get with erysipelothirx?

peracute septicemia (not seen that commonly)

10

What are chronic signs of erysipelothrix rhusioopathiae?

1. chronic arthritis
2. chronic endocarditis

11

What are the features of chronic arhtritis due to erysipelothrix?

acute synovitis
villonodular hypertrophy
fibrosis and destruction of articular cartilage

12

What are the features of chronic endocarditis?

myocardial infarcts
vegetative valvular endocarditis
cardiac insufficiency

13

What are the lesions of chronic arthritis due to erysipelothrix rhusiopathiae?

villonodular hypertrophy

14

What is the pathogenesis of erysipelothirx rhusiopathiae?

short incubation
vasculitis-->fibrinous thrombosis
nonsuppurative arthritis
septicemia in parenchyma organs
necrotizing dermatiits
chronic valvular endocarditis

15

How is erysipelothrix diagnosed?

bacterial culture
peracute/acute: systemic sites, blood culture, acute skin lesions
chronic: synovial tissue, endocarditisd

16

how is erysipelothrix treated?

1. antimicrobial treatment

17

How is erysipelothrix controlled?

1. hygiene and sanitation (shed profusely, killed by disinfectants)
2. vaccination (also do in face of outbreak, not useful for chornic?)

18

What is the etiology of porcine dermatitis and nephropathy

associated with PCV2/PCVAD

19

What must porcine dermatitis and nephropathy lesions be differentiated from?

1. other septicemias
2. classical swine fever (kidney)
3. erysipelas (skin)

20

What are clinical signs of porcine dermatitis and nephropathy syndrome?

grow finish and young adults
peracaute: found dead
skin lesions, severe systemic disease
or mild localized with spontaneous recovery
(coalescing lesions)

21

What is the pathogenesis of porcine dermatitis and nephropathy syndrome?

necrotizing vasculitis-skin and kidney
type 3 sensitivity involving immune complex deposition
associated with GLOMERULONEPHRITIS

22

What is the pathology of porcine dermatitis and nephropathy syndrome?

skin: red/purple, irregular
kidney: enlarged, mottled, petechial hemorrhages
if systemic then serous effusions, petechial ecchymotic hemorrhages

23

What are two exotic diseases that can present similar signs to porcine dermatitis and nephropathy syndrome?

classical swine fever
african swine fever
however with these there is fevere, no kidney dz, leukopenia, thrombocytopenia

24

is sarcoptic mange common in the commercial industry?

no

25

What does sarcoptic mange predispose to?

greasy pig disease

26

Is sarcoptic mange potentially zoonotic?

yes (human dead end host)

27

What are the clinical signs of sarcoptic mange?

lesions 3wks post contact
puritis
erythematous papaule (hypersensitivity)
small encrustations
if chronic then excessive keratinization
aural hematomas

28

How is sarcoptic mange diagnosed?

skin scraping
potassium promide--exoskeleton of mite (ear canal)

29

How is sarcoptes treated?

topical insecticides-not many left
ivermectin/dectomax

30

How is sarcoptes eliminated form the herd?

cull chronic
ivomec
sanitation