Changes

Jump to navigation Jump to search
Line 1: Line 1: −
Caused by [[Actinobacillus pleuropneumoniae]]
+
#redirect[[Actinobacillus pleuropneumoniae]]
 
  −
*Clinical signs and epidemiology:
  −
**Acute disease in susceptible herds with high morbidity and mortality (up to 50%)
  −
**In acute outbreaks, pigs may be dyspnoeic, pyrexic or anorexic
  −
**Blood-stained froth surrounding nose and mouth
  −
**Cyanosis
  −
**Pregnant sows abort
  −
**Causes [[Respiratory Bacterial Infections - Pathology#Actinobacillus pleuropneumoniae|pneumonia]] in pigs
  −
**Carrier herds have some immunity, protecting from acute disease, where lesions are often subclinical, and deaths sporadic
  −
**Lung scarring and pleural adhesions in many recovered animals
  −
**Solid immunity develops in recovered animals to all serotypes
  −
**The disease is spread between herds by carrier pigs
  −
*Diagnosis:
  −
**Haemorrhagic consolidation close to the main bronchi and fibrinous pleuritis may be suggestive
  −
**Specimens are cultured on chocolate agar and blood agar in 5-10% carbon dioxide for 2-3 days
  −
**Small colonies surrounded by clear haemolysis
  −
**No growth on MacConkey agar
  −
**Positive CAMP reaction with ''[[Staphylococcus aureus]]''
  −
**Most strains are NAD-dependent (grow on Heated Blood agar)
  −
**Immunofluorescent- or PCR-based techniques
  −
**The bacteria on the [[Tonsils - Anatomy & Physiology#Palatine|palatine tonsil]] may remain undetected by serological tests and swabbing, and can therefore cause an outbreak in naive pigs
  −
*Treatment:
  −
**Antibiotics depending on the strain of bacteria
  −
**Prophylactic antibiotics for in-contact pigs
  −
*Control:
  −
**Killed and polyvalent bacterin vaccines as well as a subunit vaccine are available 
  −
**Improve ventilation, avoid chilling and overcrowding
  −
 
  −
*Caused by [[Haemophilus pleuropneumonia|''Haemophilus (Actinobacillus) pleuropneumonia'']]
  −
*Seen mainly between 6wks-6mths of age but will affect any age
  −
*Highly pathogenic strains are capable of initiating disease on their own with high mortality in young pigs
  −
*A fibrinonecrotic [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|broncho]][[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|pneumonia]] with [[Pleural Cavity & Membranes Inflammatory - Pathology|pleurisy]]
  −
*Foci of haemorrhagic consolidation or necrosis, mainly around major bronchi, tend to sequestrate
  −
*Tending to spread throughout all lung lobes: therefore a cranioventral distribution may not be particularly evident
  −
 
  −
 
  −
[[Category:Pig]][[Category:To_Do_-_Clinical]]
  −
[[Category:Respiratory_Bacterial_Infections]]
 
Author, Donkey, Bureaucrats, Administrators
53,803

edits

Navigation menu