Flashcards in Porcine skin disease Deck (37)
What skin diseases cause cyanotic scabs?
1. Erysipelothrix rhusiopathiae
2. porcine dermatitis and nephropathy syndrome (PCV2)
What skin disease causes crusts, scales and grease?
What causes puriritic skin dz in pigs?
What percentage of healthy swine are carriers of erysipelothrix rhusiopathiae?
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
What is the susceptibility to erysipelothrix rhusiopathiae
passive antibody protective
all ages susceptible
What are the clinical signs of erysipelothrix rhusiopathiae?
1. found dead
3. diamond skin disease
widespread ischemic necrosis (severe)
What is an indication that a skin area will devleop ischemic necrosis?
pitting edema, piloerection
What can baby pigs get with erysipelothirx?
peracute septicemia (not seen that commonly)
What are chronic signs of erysipelothrix rhusioopathiae?
1. chronic arthritis
2. chronic endocarditis
What are the features of chronic arhtritis due to erysipelothrix?
fibrosis and destruction of articular cartilage
What are the features of chronic endocarditis?
vegetative valvular endocarditis
What are the lesions of chronic arthritis due to erysipelothrix rhusiopathiae?
What is the pathogenesis of erysipelothirx rhusiopathiae?
septicemia in parenchyma organs
chronic valvular endocarditis
How is erysipelothrix diagnosed?
peracute/acute: systemic sites, blood culture, acute skin lesions
chronic: synovial tissue, endocarditisd
how is erysipelothrix treated?
1. antimicrobial treatment
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?)
What is the etiology of porcine dermatitis and nephropathy
associated with PCV2/PCVAD
What must porcine dermatitis and nephropathy lesions be differentiated from?
1. other septicemias
2. classical swine fever (kidney)
3. erysipelas (skin)
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
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
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
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
is sarcoptic mange common in the commercial industry?
What does sarcoptic mange predispose to?
greasy pig disease
Is sarcoptic mange potentially zoonotic?
yes (human dead end host)
What are the clinical signs of sarcoptic mange?
lesions 3wks post contact
erythematous papaule (hypersensitivity)
if chronic then excessive keratinization
How is sarcoptic mange diagnosed?
potassium promide--exoskeleton of mite (ear canal)
How is sarcoptes treated?
topical insecticides-not many left