Many bacteria species live on the skin of dogs without creating any symptoms. Infection arises when conditions allow germs to multiply. A flea infestation, an allergic reaction, a wound, or an underlying condition that weakens the immune system could be the cause. Many other bacteria may be involved, however staphylococcus pseudointermedius is the most prevalent species linked to pyoderma in dogs. Pyoderma is a term that refers to any bacterial skin infection that produces pus. It is derived from the Greek words "pus" and "skin." Pustules in dogs can be red, itchy spots that ooze blood and discharge when they break. Infections that are severe can lead to death. Infections that are severe can lead to painful ulcerations and boils. Bacteria thrive in wet environments, therefore many pyoderma infections are caused by another disease that causes the skin to become oily and moist. Skin wrinkles or regions of damaged, inflamed skin are more likely to show signs. ...