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==Description==
==Description==
'''Glasser's disease''' is caused by the bacteria ''[[Haemophilus parasuis]]''.
'''Glasser's disease''' is caused by the bacteria ''[[Haemophilus parasuis]]''.
It is a systemic condition affecting pigs characterised by polyserositis, arthritis and meningitis. It is rapidly fatal in the acute form, in some cases animals die before the development of lesions.
It is a systemic condition affecting young pigs characterised by polyserositis, arthritis and meningitis. It is rapidly fatal in the acute form, in some cases animals die before the development of lesions. In older pigs bronchitis and other symdromes may also occur.
==Signalment==
==Signalment==
The disease usually affects weanlings '''6-10 weeks old''' when maternal antibodies wane but it can affect pigs of any age, particularly naive pigs introduced into a herd or through exposure to a strain to which there is little immunity.
The disease usually affects weanlings '''6-10 weeks old''' when maternal antibodies wane but it can affect pigs of any age, particularly naive pigs introduced into a herd or through exposure to a strain to which there is little immunity. The stress of mixing, weaning and adverse environmental conditions are predisposing factors.
The disease occurs '''worldwide''', it is endemic in most herds but incidence of clinical disease in the UK is sporadic due to widespread acquired resistance. Increased prevelance hgas been associated with [[Porcine Reproductive and Respiratory Syndrome|PRRS]], [[Porcine Circoviruses|Circovirus]] and [[Swine Influenza|Swine Influenza.]]
The disease occurs '''worldwide''', it is endemic in most herds but incidence of clinical disease in the UK is sporadic due to widespread acquired resistance. Increased prevelance hgas been associated with [[Porcine Reproductive and Respiratory Syndrome|PRRS]], [[Porcine Circoviruses|Circovirus]] and [[Swine Influenza|Swine Influenza.]]
*Sudden death
*Sudden death
Clinical signs develop rapidly, the disease is often fatal within 2-5 days. The skin becomes discoloured, turning red to blue before death. Expressed lesions vary between animals - meningitis is most consistent, arthritis in 20% of cases
Clinical signs develop rapidly, the disease is often fatal within 2-5 days. The skin becomes discoloured, turning red to blue before death. Expressed lesions vary between animals.
Survivors or those affected by the chronic form of the disease show less severe clinical signs of weight loss and depression, they become lame with arthritis, develop congestive heart failure, pericarditis or intestinal obstruction due to formation of adhesions. Pregnant sows may abort their fetuses.
===Pathology===
*May cause suppurative [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|broncho]][[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|pneumonia]] and [[Pleural Cavity & Membranes Inflammatory - Pathology|pleuritis]] (as part of polyserositis)
Septicaemia
Acute inflammation affecting pleura, peritoneum, mediastinum, pericardium, joints and meninges
Causes a polyserositis - pericarditis, [[Peritonitis|peritonitis]], pleurisy and meningitis
Also causes suppurative [[Respiratory Bacterial Infections - Pathology#Glasser's disease|bronchopneumonia, pleuritis]], [[Joints Inflammatory - Pathology#In Pigs|polyarthritis]] (also ''H. suis)
Fever, general malaise, repsiratory and abdominal signs, lameness, paralysis or convulsions.
Due to transport, environmental stresses, dietary and managemental factors
Fibrinous pneumonia secondary to enzootic pneumonia or virus infection e.g. swine influenza
==Treatment==
==Treatment==
==References==
==References==
[[Category:Pig]]
[[Category:Pig]]