Inffi 2, Swine respiratory diseases Flashcards
Porcine respiratory coronavirosis (PRC)
A very contagious disease of weaner pigs caused by PRCV. Respiratory route.
Infection with PRCV makes pigs immune to TGEV!
Infects pigs of all ages, clinical illness in 1-6m old pigs.
Mild fever, dyspnea, polypnea, anorexia, in monoinfection in suckling piglets may have a cough for short period, may co unnoticed.
Adult mostly subclinical.
Not a big problem, no prevention measures, no vaccines.
Post mortem findings of porcine respiratory coronavirosis
Bronchointestinal pneumonia: cran. & middle lobe have thick consistence, dark red to purple color.
Mycoplasmal pneumonia (MP) or enzootic pneumonia
A chronic resp. disease of pigs, caused by Mycoplasma hyopneumoniae. Resp. route.
Stress related, seasonal (nov-mar), mostly chronic, rarely acute outbreaks.
Acute
- Occurs when agent is first introduced to herd
- Morbidity <100%
- Acute respiratory distress, acute pneumonia, dehydration, fever
- High mortality in all age groups
- Outbreak lasts for 3 m -> chronic
Chronic
- Clinical signs seen in suckling piglets
- Dry cough, difficulties to breath, uneven growth rate, loss of appetite
Treatment; to MP penicillin doesn’t work, to enzootic wide range ABs or combination ABs.
Vaccinations available.
Post mortem findings in mycoplasmal pneumonia (MP) or enzootic pneumonia
Lesions in apical and cardiac lung lobes, lesions more severe right side of the lungs
Bronchial LNs enlarged, edematous
With secondary infections, pleuritis and pericarditis
Actinobacillus pleuropneumonia (APP)
A contagious disease of pigs, caused by Actinobacillus pleuropneumoniae. Resp. route.
More common during winter and spring.
On 1st introduction to herd infects most commonly 2-4m old growing pigs, in endemic herds weaner and new animals.
Peracute, acute and chronic.
AB treatment in early stages, vaccination available.
Peracute form of actinobacillus pleuropneumonia (APP)
Fever 41-42C
Death in just few hours
Acute form of actinobacillus pleuropneumonia (APP)
Severe respiratory distress
High fever
Labored respirations with exaggerated abdominal component
Cyanosis
Frequent blood-stained frothy discharge from nose and mouth
Death in 1-2 days
Chronic form of actinobacillus pleuropneumonia (APP)
Common sequel to acute case
Initially febrile and anorexic
Respiratory distress is less severe
Persistent cough may develop
Post mortem findings in actinobacillus pleuropneumonia (APP)
Pleuritis
Hemorrhagic and fibrinous pleuropneumonia
FIRST LESIONS WILL APPEAR IN THE MIDDLE OF THE LUNG LOBE.
Which 2 diseases are under the name atrophic rhinitis?
Nonprogressive atrophic rhinitis (NPAR)
Progressive atrophic rhinitis (PAR)
Nonprogressive atrophic rhinitis (NPAR)
A chronical infectious disease of pigs, caused by Bordetella bronchiseptica, characterized by
usually transient turbinate atrophy. Disease of young growing pigs. Resp. &oral route.
Potential pathogen for other mammals like cats, dogs, rats.
Sneezing, nasal discharge, epistaxis, twisted snout, growth rate may decrease.
Mild, nonprogressive so nasal turbinates will recover and regenerate.
AB treatment at early stage, vaccination available.
Progressive atrophic rhinitis (PAR)
A chronical infectious disease of pigs, caused by Pasteurella multocida, characterized by
shortening or distortion of the snout, sneezing,
nasal discharge and epistaxis
Severe, nonreversible turbinate atrophy with no inflammatory reaction even in just few days.
ABs in early stage, vaccination available.
Post mortem findings in nonprogressive atrophic rhinitis and progressive atrophic rhinitis
Atrophy of the mucosa
Decalcification and atrophy of the turbinate and ethmoid bones, in severe cases they have disappeared completely.
