Recurrent colic, depression, intermittent fever and inappetence are some of the symptoms seen. If an internal abscess ruptures this is often fatal. Purpura hemorrhagica symptoms usually develop 2-4 weeks after the typical upper respiratory form of strangles has occurred. Often the swelling becomes so great that patches of skin slough. Internal organs such as the intestine, lungs, and kidneys, can be affected.
Fever is also present.
Laminitis may also occur with purpura. Treatment External abscesses are hot packed to hasten maturation and rupture. Horse should be monitored to see if they could breathe and swallow. Rectal temperature, feed and water consumption should also be observed. Antibiotics are used in serious cases but abscesses are best managed by allowing them to drain and heal naturally.