Bacterial Skin Disease Flashcards
What is bumble foot? Which spp get this?
- S. aureus
- Birds and small furries
- usually associated with obesity/management problems
Is pyoderma ever primary?
No always 2*, opportunistic bacteria
- always ID and Tx underlying cause
What may predispose to 2* pyoderma?
- break in physcial skin barrier (trauma)
- loss of immunity
- ectoparasites, alleriges, cornification defects, neoplasia, alopecia
- endocrinopathy, metabolic/nutritional problems
What is exudative epidermitis in pigs known as? Pathogen?
- staph hyacus
- Greasy pig disease
Which bacteria are most commonly involved with pyoderma?
> Staph (G+) - s. pseudintermedius - may be other staphs too eg. hyicus in pigs > Strep (G+) > G- (esp deep pyoderma) - coliforms - pseudomonas - proteus
History signs of pyoderma?
- recurrent pyoderma
- previous response to Abx therapy
Clinical signs seen with pyoderma?
- papules
- pustules
- epidermal collarettes
- draining sinuses
Cytology findings of pyoderma?
- tape strip, impression smear stained
- need intracellular bacteria and inflammatory cells (presence of bacteria is not diagnositc)
Is C+S used to diagnose pyoderma?
- NO!!!
- used to ID organisms but not diagnose pyoderma
- search for underlying/triggering causes
Tx surface pyoderma?
- long term therapy
- surgical correction? skin folds
- ABx topical shampoo/cream
What are the 3 forms of pyoderma?
- Surface
- Microbial proliferation
- eg. Intertrigo (folds), mucocutaneous pyoderma
- eg. pyotraumatic dermatitis [painful!]
- bacterial overgrowth
- pruritis
> Superficial
- Impetigo (puppies)
- Folliculitis/supf. pyoderma
- very common
- pruritis
> Deep
- furunculosis
- acne (chin)
- bacterial granuloma
- painful
Ddx mucocutaneous pyoderma?
Lupus
- if responds to Abx then is pyoderma, if not is immune mediated
What is pyotraumatic dermatitis? What type of opyoderma is this?
- acute
- Painful
- but SURFACE pyoderma
- hot spot or acute moist dermatitis
- serlf trauma or bacterial invasion
-> disruption of stratum corneum - often large breeds eg. retriever
> underlying pruritic problem (FAD, anal sac irritation, otitis)
Tx pyotraumatic dermatitis hotspots?
- topical Abx
- anti-inflam depending on severity (topical/systemic GCs)
- treat underlying causes
What pathology is seen in similar dogs and appears similarly to pyotraumatic hot spots but is differnet? Tx?
- Pyotraumatic FOLLICULITIS and FURUNCULOSIS
- satellite lesions suggest haematogenous spread = dermis
- => deep pyoderma
- GC CONTRAINDICATED