Difference between revisions of "Contagious Porcine Pleuropneumonia"

(Redirected page to Actinobacillus pleuropneumoniae)
 
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Caused by [[Actinobacillus pleuropneumoniae]]
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#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 [[Bronchitis#Infectious causes of bronchitis or bronchiolitis|broncho]][[Pneumonia Overview#Infectious causes of pneumonia|pneumonia]] with [[Pleuritis|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:Respiratory Diseases - Pig]][[Category:To_Do_-_Kate]]
 
[[Category:Respiratory_Bacterial_Infections]]
 

Latest revision as of 18:49, 14 March 2011