ThePigSite Pig Health
Middle Ear Infection
(432) This is caused by a variety of bacteria, but mainly streptococci, that gain access to the middle part of the ear, the part responsible for balance. Infection probably arises from the tonsils at the back of the throat and travels down the eustachian tube to the middle part of the ear. The condition is sporadic but common and in some farms up to 5% of weaner pigs may be affected. It must be recognised early and if treatment is prompt there is usually a good response. If treatment is delayed there is the risk that infection will spread from the middle ear into the inner ear and directly to the brain, setting up a meningitis or encephalitis (inflammation of the brain). Actinobacillus pleuropneumonia has also been identified in outbreaks of the disease and bacteriological examinations should always be carried out if abnormal numbers of pigs are involved.Clinical signs
The pig stands with its head to one side often shaking with evidence of pain. As the disease progresses there is a gradual loss of co-ordination until ultimately the pig walks around in a circle eventually falling over. Disease in the sow is often severe and such animals are best culled if the response to treatment is poor.
Treatment
Management control and prevention
