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| | ====Clinical Signs==== | | ====Clinical Signs==== |
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| − | The virus causing Eastern Equine Encephalomyelitis (EEE) is the most virulent of the three types and the symptoms produced are the most severe, The viraemia (level of virus in the blood) may be so high with this strain that horse to mosquito to horse cycling can occur.
| + | Worse in unvaccinated horses. |
| − | Muscle twitchings may occur in the face and shoulder muscles. A period of severe depression follows. Affected horses stand with their heads hung low and may have a half-chewed mouthful of feed hanging from their lips. The animal appears to be asleep and is unable to hold up his head and often rests it on some solid object.
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| − | Although VEE does not cause as high a mortality as WEE/EEE, the clinical signs are similar. However, a second generalised infection may be caused by the virus causing fever, depression, colic and diarrhoea.
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| − | Worse in unvaccinated animals. | |
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| | =====EEE and WEE===== | | =====EEE and WEE===== |