Term
Clinical signs of bacterial skin infections |
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Definition
should be compatibile with pyoderma
- recognise the depth of pyoderma- surface, superficial,deep- each implies a diff therapy and prognosis
- if see seborrhoeic pyoderma- bacterial overgrowth syndrome
- papules, pustules and scaling - superficial folliculitis
- erosions and ulcers- pyotraumatic dermatitis
- ulcers and draining tracts- deep pyoderma
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Term
Site selection for cytology and culture |
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Definition
Primary lesion: leading edge of ulcers, non ulcerated nodules, intact pustules, furuncles
avoid: secondary, chronic and excoriated lesions- unless they are the only lesions
Gently CLIP HAIR
GENTLY debride crust or haemorrhage
Impression smear or direction impression smear
Adhesive tape strips
FNA
Staining |
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Term
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Definition
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Term
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Definition
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Term
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Definition
Bacterial overgrowth syndrome |
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Term
When can you do Emperical choice of antibiotics for pyoderma |
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Definition
Must:
- non life threatening infection
- first episode
- SURFACE OR SUPERFICIAL PYODERMA
- consistent with STAPHYLOCOCCI
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Term
When to do Bacterial culture and sensitivity for pyoderma |
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Definition
FOR:
life threatening
deep pyoderma
clinical signs and cytology not consistent
Rod bacteria on cytology
Empirical ab not effective
- kirby bauer dis diffusion tests use antibiotic paper discs- zone of inhibition around the disc determines whether the bacteria are susceptible or resistant.
- MIC- using E strips
- further testing PCR to confirm MRS( meticillin resistant staph)
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Term
When to suspect antibiotic resistance |
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Definition
after one or more BS ab course
non healing wounds
post op infections
if using topical- use culture results as guide for treatment |
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Term
Does the infection require treatment? |
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Definition
not all require systemic AB
mild, non LT, limited focal infections
consider topical ABs or antimicrobials
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Term
First line AB for pyoderma |
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Definition
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Term
Second line ab for pyoderma |
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Definition
broad spectrum drugs important for animals and humans
- only if culture evidence shows that the first line defense ab wont work- need to prevent resistance.
Enrofloxacin, marbofloxacin...FQs |
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Term
Third line ab for pyoderma |
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Definition
treating multi drug resistant organisms
most are not licensed for animals
Aminoglycosides, chloramphenicol, rifampin |
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Term
Penetration into inflammed tissues |
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Definition
skin and chronic inflammation relatively avascular
- pus and decrotic debris inactivate sulfonamides, macrolides, lincosamides and aminoglycosides.
- FQs- penetrate well into inflamed skin
- FQs, lincosamides, macrolides- accumulate in phagocytes |
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Term
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Definition
resolution of lesions and normal cytology
surface and superficial- usually 2-3 weeks
deep- often improved in 2 weeks, full res. in 4-6 weeks
REGULAR check ups to check response- every 7-14 days! |
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Term
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Definition
- look for underlying cause, primary is rare
- topical antimicrobial shampoos and rinses
- maybe immunostimulants? ( staph vaccines, staph phage lysate)
- pulse ABs are a last resort- idiopathic recurrent, atopic dermatitis, cefalexin or clavulanate-amoxicillin
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Term
Topical antibacterial therapy |
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Definition
warm water baths or soaks
whirlpool baths
showers
contact time 10 min
2-3 times a week initially
2-4 times monthly for maintenance |
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