pyoderma

This term is a technical medical descriptor used primarily in dermatology and veterinary medicine. It describes a broad category of skin infections rather than a single specific disease, encompassing various conditions where pus accumulates in the dermis or epidermis.

Because it refers to a pathological state or a clinical diagnosis, it is treated as an uncountable noun in medical reporting. Practitioners typically refer to "cases of pyoderma" or "the presence of pyoderma" rather than using a plural form.