Changes

==Introduction==

==Introduction==

Superficial pyoderma describes '''cutaneous bacterial infection''' that is confined to the stratum corneum of the interfollicular skin and hair follicles. Normal skin is colonised by a variety of resident bacterial and fungal organisms. They are not normally pathogenic and sometimes help prevent colonisation of pathogenic species through niche competition.

Potentially pathogenic coagulase-positive ''Staphylococci'' colonise mucocutaneous junctions and mucosal reservoirs are an important source of infection.

Superficial pyoderma describes '''cutaneous bacterial infection''' that is confined to the stratum corneum of the interfollicular skin and hair follicles. Normal [[Skin - Anatomy & Physiology|skin]] is colonised by a variety of resident bacterial and fungal organisms. They are not normally pathogenic and sometimes help prevent colonisation of pathogenic species through niche competition.

Potentially pathogenic coagulase-positive ''[[Staphylococcus species|Staphylococci]]'' colonise mucocutaneous junctions and mucosal reservoirs are an important source of infection.

It is an extremely common form of skin disease in the '''dog''', and the organism '''''Staphylococcus intermedius''''' predominates, but ''Staphylococcus aureus'', ''Staphylococcus pseudintermedius'' and other species may also be found.

It is an extremely common form of skin disease in the '''dog''', and the organism '''''Staphylococcus intermedius''''' predominates, but ''[[Staphylococcus aureus]]'', ''Staphylococcus pseudintermedius'' and other species may also be found.

Changes to the microenvironment of the skin lead to the development of conditions '''favouring the growth''' of these pathogenic staphylococci. Inflammatory reactions to bacterial products can lead to further multiplication of bacteria.

Changes to the microenvironment of the skin lead to the development of conditions '''favouring the growth''' of these pathogenic staphylococci. Inflammatory reactions to bacterial products can lead to further multiplication of bacteria.

Superficial pyoderma may be a '''primary condition''', but this is rare, and most recurrent pyodermas are '''secondary to underlying cutaneous and systemic disorders''' such as ectoparasites, hypersensitivities, endocrinopathies and keratinisation defects.

Superficial pyoderma may be a '''primary condition''', but this is rare, and most recurrent pyodermas are '''secondary to underlying cutaneous and systemic disorders''' such as ectoparasites, [[:Category:Hypersensitivity|hypersensitivities]], endocrinopathies and keratinisation defects.

'''Horses and farm animals''' can also suffer from superficial pyoderma, such as Equine Pastern Folliculitis, Dermatophilosis, Ovine Fleece Rot and Greasy Pig Disease.

'''Horses and farm animals''' can also suffer from superficial pyoderma, such as [[Greasy Heel|Equine Pastern Folliculitis]], [[Dermatophilosis]], [[Ovine Fleece Rot]] and [[Greasy Pig Disease]].

==Clinical signs==

==Clinical Signs==

Superficial pyodermas are '''not usually pruritic''', although some dogs exhibit marked pruritus presumably due to a hypersensitivity to the bacteria.

Superficial pyodermas are '''not usually pruritic''', although some dogs exhibit marked pruritus presumably due to a hypersensitivity to the bacteria.

Different presentations of superficial pyoderma occur:

Different presentations of superficial pyoderma occur:

'''Impetigo''': non-follicular pustules, epidermal collarettes in puppies and adolescents

'''[[Impetigo]]''': non-follicular pustules, epidermal collarettes in puppies and adolescents

'''Folliculitis''': which is the most common form of pyoderma. Pustules and papules associated with the follicles, patchy alopecia.

'''Folliculitis''': which is the most common form of pyoderma. Pustules and papules associated with the follicles, patchy alopecia.

==Diagnosis==

==Diagnosis==

The clinical signs are highly suggestive, although they do sometimes ressemble '''ringworm''' and a fungal culture might have to be performed to exclude it.

The clinical signs are highly suggestive, although they do sometimes resemble '''[[ringworm]]''' and a fungal culture might have to be performed to exclude it.

'''Impression smears, tape strips and aspirate cytology''' may reveal degenerate neutrophils and intracellular cocci.

'''Impression smears, tape strips and aspirate cytology''' may reveal degenerate [[neutrophils]] and intracellular cocci.

'''Biopsy and histopathology''' can help confirm or rule out underlying conditions and may reveal an intraepidermal pustular dermatitis, or a superficial suppurative folliculitis.

'''Biopsy and histopathology''' can help confirm or rule out underlying conditions and may reveal an intraepidermal pustular dermatitis, or a superficial suppurative folliculitis.

==Management==

==Management==

'''Topical therapy''' can be used to soften and remove crusts and improve pain and pruritus if present. '''Topical antibiotics''' might be usefuly in certain areas such as the mucocutaneous junction, ears and feet. Fusidic acid has been used with success.

'''Topical therapy''' can be used to soften and remove crusts and improve pain and pruritus if present. '''Topical antibiotics''' might be useful in certain areas such as the mucocutaneous junction, ears and feet. Fusidic acid has been used with success.

'''Systemic antibiotic therapy''' should be given for a '''minimum of 3-4 weeks''' and should be continued one week past clinical resolution.

'''Systemic antibiotic therapy''' should be given for a '''minimum of 3-4 weeks''' and should be continued one week past clinical resolution.

Schaer, M. (2010) '''Clinical medicine of the dog and cat''' ''Manson Publishing''

Schaer, M. (2010) '''Clinical medicine of the dog and cat''' ''Manson Publishing''

[[Category:Integumentary System - Bacterial Infections]]

[[Category:Integumentary System - Bacterial Infections]]