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Flashcards in Lecture: bacterial skin diseases Deck (70)
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31

If you suspect demodex do...

  • deep skin scraping
    • if properly done, negative tests can rule out demodex

32

Adult cigar shaped things on skn scrapings

demodex

33

Diagnosis

  • clinical signs
  • always r/o other causes of folliculitis
    • skin scrapings
  • cytology
  • culture
  • biopsy
  • response to Rx

34

Therapy

  • Antiobiotics (3-4 weeks)
  • Topical therapy
  • Identify and correct underlying cause

35

Equine folliculitis

  • staph
  • dermatophilus congolensis

36

Dermatophilosis

  • Gram + aerobic, or facultative anaerobe
  • actinomycete
  • common
  • organisms in crust
  • zoonotic

37

3 imp factors for infection

  • chronic carriers
    • zoospores resist drying at 100 deg C
    • survives in scabs for 42 months
  • moisture, rain, sweating
  • break in skin integrity
    • trauma, ectoparasites

38

secondary effect of dermatophilus

photosensitizing

39

dermatophilosis

DX

  • cytology
    • railroad tracks

40

Dermatophilosis TX

  • Ususally self-limiting
  • remove from rain
  • Topical
    • benzoyl peroxide and chlorahexidine shampoo
  • Systemic
    • AB for minimum of 2 weeks
      • TMP-sulfa (oral)
      • Penicillin (injectible)

41

Things that don't treat dermatophilus

iodine

42

Penicillin doesn't work for....

canine staph

43

Staphylococcal Folliculitis/Furunculosis

  • staph aureus
  • complication of most pruritic diseases
  • no breed, age predilection

44

staphylococcal Folliculitis/Furunculosis

3 main syndromes

  • Trunk
  • Tail
  • Pastern

45

Truncal Folliculitis

(Heat rash, saddle rash)

  • Painful papulonodular eruption
  • Saddle areas & can spread
  • horse may be non-compliant

46

Tail pyoderma

  • pustules in dorsal area of tail
  • induced by tail rubbing
  • pruritic
  • increases self induced trauma

47

Pigs

  • Exudative Epidermitis
    • S. hyicus
    • toxins absorbed: liver and kidney dz
  • Suckling pigs

48

Pigs and crusty dermatitis

  • Mites (pigs often get mites)
    • do cytology and scraping in case you need to treat staph and mites

49

Deep pyoderma

  • Furuncolosis
  • Abscess/cellulitis/panniculitis

50

Furunculosis

  • Hair fllicles rupture and infection spreads to dermis
  • infection may be mixed
  • Need antibiotics so they don't get systemic infection and sepsis

51

Furunculosis

CS

  • Ulcers
  • Fistulous tracts
  • Pustules / Bulla
  • Cellulitis

52

Localized furunculosis

  • can be from demodex
  • can be on face / chin
  • pressure point pyoderma

53

Acral lick dermatitis

  • treat like deep pyo
  • give AB
  • Then look for underlying disease

54

German Shepherds prone to

deep Pyoderma

55

A dog with deep pyoderma

DX

  • R/O Demodex
  • Cytology
  • Culture
  • Biopsy
  • Response to AB

56

length of AB for superficial pyoderma

3-4 weeks

(7-10 days after resolution of clinical signs)

 

57

Dog with lesions on the face, and/or lesions on the feet

ALWAYS HAVE TO SCRAPE

58

Deep pyo TX

  • Antibiotics
  • Topical therapy
  • Underlying cause
  • Immunotherapy
  • AVOID STEROIDS

59

Deep pyo lenth of AB

  • At least 2 months
  • Choice of AB based on CULTURE/SENSITIVITY, cost and safety

60

Try to match your (dx tools)...

Culture with cytology

(always do both)