Final answer:
Animals can get vasculitis due to certain infections, which can cause inflammation in the heart and blood vessels. This inflammation can result in damage to blood vessels and the formation of purple spots on the skin.
Step-by-step explanation:
Animals can get vasculitis, which is inflammation of the blood vessels, due to certain infections. Infections can cause inflammation in the heart and blood vessels, leading to vasculitis. For example, certain bacteria like Streptobacillus moniliformis and Spirillum minor can cause vasculitis in animals. Inflammation of blood vessels can result in damage and rupture of blood vessels, leading to the formation of purple spots called petechiae on the skin.