Changes

Chronic '''progressive polyserositis''' in pigs under 10 weeks old  

Chronic '''progressive polyserositis''' in pigs under 10 weeks old  

'''Lameness and swollen joints,''' arthrogryposis

'''Lameness and swollen joints'''are common and congenital arthrogryposis may be seen in young stock.

Fever

Fever usually accompanies clinical signs and animals often have a rough, dull, staring hair coat

'''Laboured breathing, tachycardia'''

'''Laboured breathing and tachycardia''' are non-specific cardiorespiratory signs.

'''Aural discharge''' with a foul odour and deafness

'''Aural discharge''' with a foul odour represents otitis and may result in deafness. Otitis media may cause a head tilt and vestibular signs.

Otitis media may cause a head tilt and vestibular signs.

Dysphagia and vomiting/regurgitation are less common but significant.

Dysphagia and vomiting/regurgitation

Neurological and ocular signs

Rough, dull, staring hair coat

'''Serofibrinous pleurisy, pericarditis and peritonitis''' are pathological features of ''M. hyorhinis''.

==Diagnosis==

==Diagnosis==

'''Joint fluid, synovial membranes and samples from the pleura, pericardium and peritoneum''' can be used for '''culture''' of ''M. hyorhinis''.

'''Joint fluid, synovial membranes and samples from the pleura, pericardium and peritoneum''' can be used for '''culture''' of ''M. hyorhinis''.