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Glässers Disease (Haemophilus Parasuis)

See also chapter 9

(265) This disease caused by the tiny bacteria Haemophilus parasuis normally affects the sucking and young growing pig, but it occasionally affects the gilt. Lameness occurs in any of the legs with slight swellings over the joints and tendons. It is rare to see this disease in the dry sow. The organism has an affinity for the smooth shiny surfaces covering the joints, tendons and other tissues, including the pericardium (heart sac) and meninges where it causes pericarditis and meningitis.

Clinical signs

In the young gilt lameness and stiffness are the most common signs.


In the living animal this is difficult, because it is similar to Mycoplasma hyosynoviae infection of joints and tendon sheaths. Post-mortem examinations and/or samples taken aseptically from infected joints for culture will help to differentiate.


  • Haemophilus parasuis is normally sensitive to injections of penicillin, synthetic penicillins, ampicillin or amoxycillin, and oxytetracycline.
  • The response to a daily injection, given for at least 3 or 4 days, is usually good provided treatment is instituted early.
  • Because this disease can be very difficult to differentiate from mycoplasma infection a combination of treatments using penicillin and tiamulin injections may be used daily for 3 to 4 days to cover both infections.

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