Inffi 3, respiratory and joint diseases Flashcards
Pneumonic pasteurellosis
A sporadic disease of swine, caused by Pasteurella multocida,
characterized by acute bronchopneumonia. Resp. or oral route.
Fever <41°C
Anorexia, lethargy
Resp. distress with labored respiration and increased lung sounds
Breathing through the mouth
Cyanosis
Death in 4-7 days if not treated
AB treatment, vaccination ineffective
Post mortem findings in pneumonic pasteurellosis
Pneumonia, chronic bronchopneumonia with
abscessation
Pleuritis, pericarditis
Swine influenza
A very contagious disease of
swine, caused by Orthomyxovirus (swine influenza virus SIV), and characterized by fever, muscle stiffness and thumps. Resp. route.
Affects pigs of all ages, mostly 2-8 w old piglets.
ZOONOSIS! High morbidity, seasonal, fall-winter.
Depression, weakness, anorexia
Fever 42°C
Dyspnea, coughing, ‘thumps’
Prostration
Mucous discharge from nose and eyes
No specific treatment, no documented effect on vaccines
Post mortem findings in swine influenza
LNs swollen and edematous
Pneumonic areas of lungs - demarcated, collapsed, purplish red (more severe ventrally)
Mucopurulent exudate from airways
Streptococcus suis infection
Mostly a disease of piglets and growing pigs (commonly 5-10w old), caused by Streptococcus suis, characterized by septicemia, meningitis, joint infections and bronchopneumonia.
Resp., genital, and oral routes.
ZOONOSIS!
Initial signs: fever, inappetence, depression, shifting lameness
In peracute cases: death without previous signs
SEPTICEMIA
MENINGITIS:
- holding ears back, squinting eyes
- depression, incoordination, unusual stances (e.g.sitting dog)
- inability to stand, paddling, opisthotonos (jäykkäkouristus), convulsions, nystagmus
POLYARTHRITIS:
- swollen joints and lameness
ENDOCARDITIS:
- dyspnea, cyanosis, wasting
- older piglets
ABs in early stages of strptococcal meningitis.
Vaccines relatively ineffective.
Post mortem findings in streptococcus suis infection
Mainly seen in weaned & growing pigs:
Lymphadenopathy
Meningitis
Arthritis
Endocarditis
Glasser’s disease
A polyserositis and arthritis
of pigs caused by Haemophilus parasuis.
Can occur in any age, most common among weaner pigs, Resp. route.
Acute and peracute: acute in 3-6w old piglets.
RESP. SIGNS:
Intensive dyspnea with abdominal respiration and cyanotic ears.
Systemic signs:
Intense feverish episode, anorexia and anemia.
POLYSEROSITIS
JOINTS:
Limping, inflammation and hot joints
NERVOUS:
Nervous symptoms and sudden death
AB treatment in early stage, vaccination in herd with endemic problem
Post mortem findings in Glasser’s disease
GENERALISED FIBRINOUS POLYSEROSITIS
Fibrinous rhinitis and bronchopneumonia
Purulent meningitis
Fibrinous arthritis
Fibrinous pericarditis with hydropericardium
Porcine reproductive and respiratory syndrome (PRRS)
A highly contagious viral disease
of pigs, caused by Arterivirus (PRRSV), characterized by reproductive disorders, high piglet mortality and respiratory disease in young pigs.
Death usually associated with secondary infections.
Alimentary or resp. route.
2 forms: reproduction failure and resp. disease
No specific treatment, vaccination available.
Clinical signs in Porcine reproductive and respiratory syndrome (PRRS) REPRODUCTIVE FAILURE form
In pregnant gilts & sows
Initial signs:
- anorexia, lethargy, depression, mild fever
Sudden increase in early farrowing, late-term abortions, stillborn and mummified fetuses, partially autolyzed fetuses
Weak neonates with high mortality
European strain:
- cyanosis of ears, tail, vulva, abdomen and snout
Clinical signs in Porcine reproductive and respiratory syndrome (PRRS) RESPIRATORY DISEASE form
Pigs at any age
One of the most important contributor for complex of respiratory disease is PRRSV.
Especially common in nursing and weaned pigs.
- Anorexia, fever, dyspnea, polypnea, coughing, subnormal growth rates
- Bluish discoloration of the ears, vulva and abdomen may appear
- Nursery pigs: conjunctivitis, sneezing and diarrhea
Post mortem findings in porcine reproductive and respiratory syndrome (PRRS)
Interstitial pneumonia
with reduction in all alveolar
macrophages
Aborted and mummified
fetuses, stillbirths
