However, for practical purposes pyoderma is used to refer to any bacterial infection within the skin. A. Primary versus secondary This system of classification of pyoderma has decreased in usefulness as our understanding of the pathogenesis of skin disease has increased. Many bacterial skin diseases are now known to be secondary to another disease process. A diagnosis of primary pyoderma should not be made without a diligent search for predisposing causes. Disorders that can lead to pyoderma are numerous.
Sebum plays an important role in maintaining a normal flora.
Aberrations in the amount and type of sebum are a major cause of recurrent pyoderma. Allergic diseases can predispose an animal to pyoderma. Endocrine disturbances can also contribute. Demodicosis often leads to deep pyoderma. According to site Classification according to site is not particularly helpful.