Integument 2 Pictures Only

Question 1

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 1

• greasy pig
• caused by staphylococcus hyicus
• lacerations and poor nutrition predispose
• brown crusts around eyes, pinna, and face
• happens in young piglets and can be fatal
• bacteria produces an exotoxin that cleaves epidermal cells

Question 2

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 2

• greasy pig
• caused by staphylococcus hyicus
• lacerations and poor nutrition predispose
• brown crists around eyes, pinna, and face
• happens in young piglets and can be fatal
• bacteria produces an endotoxin that cleaves epidermal cells

Question 3

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 3

Canine superficial pyoderma
- pruritic superficial infection via staphylococcus pseudointermedius
- usually affects the ventral abdomen and thorax
- will see erythematous maculues, papules, and pustules, with time collarettes, alopecia, and hyperpigmentation
- red and edematous skin
- usually secondary to underlying disease, so treat the pyoderma first, then find underlying disease

Question 4

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 4

Impetigo
- severe superficial bacterial disease usually after a break in the skin
- caused by staph species
- will see bullae, vesicles, pustules that all rupture
- affects cows on the ventral abdomen, perineum, medial thigh, vulva, teats, udder
- affects dogs on the non haired part of the ventral abdomen and usually happens in prepuescent puppies or immunusuppressed adults

Question 5

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 5

Mucocutaneous pyoderma
- occurs at mucocutaneous junctions like lips, prepuce, vulva, anus
- german shepherds predisposed
- imune mediated as well as bacterial in cause
- erythema, swelling, crusting, ulceration

Question 6

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 6

Rain scald/Dermatophilosus
- caused by dermatophilus congolensis, a gram + bacteria
- happens in wet tropical or wet northern places
- lesions usually where skin gets wet so along the back and on distal extremities
- can be spread by biting insects
- will see pustules, thick crusts, and papules that mat the hair

Question 7

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 7

Dermatophytes/Ring worm
- fungal infection caused by microsporum canis sometimes T. verruosum
- happens when it’s hot, humid, and it’s super contagious
- zoonotic
- dermatophytes produce proteolytic enzymes that allow them to penetrate skin
- epidermitis, folliculitis, rings of alopecia, crusting

Question 8

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 8

Malassezia dermatitis (yeast infection)
- caused by malassezia pachydermatis
- affects the extenal ear canal and skin, in between the digits, and on the perineum
- usually a secondary infection (fleas or allergies) and associated with moisture
- will see erythematous, crusting, hyperpigmented, lichinification lesions

Question 9

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 9

Sarcoptic mange
- caused by sarcoptes scabei
- super contagious
- mites burrow into stratum corneum creating eosinophilic pustules and crusts
- very itchy/pruritic
- excoriations, traumatic hair loss, erythema

Question 10

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 10

Demodectic mange (juvenile form)
- caused by demodex canis
- localized to face and head
- self limiting
- small, scaly erythematous and alopecic areas
- mites live in the follicle causing folliculitis

Question 11

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 11

Demodectic mange (generalized form)
- caused by demodex canis
- usually dogs are immunosuppressed (you need to look for underlying disease)
- large areas of coalescing erythemia, alopecia, and scaling
- mites live within follicles causing follicultis

Question 12

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 12

flea allergy dermatitis
- caused by ctenocephalides felis and C. canis
- type I and IV hypersensitivity reaction
- anemia when severe
- red papules and secondary excoriations from self trauma

Question 13

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 13

hypersensitivity dermatitis/atopy
- a type I hypersensitivity caused by allergen exposure
- pruritis in dogs and licking
- lesions from self trauma
- secondary to pyoderma and seborrhea in dogs

Question 14

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 14

hypersensitivity dermatitis/allergic contact dermatitis
- type IV hypersensitivity due to contact with chemicals
- pruritis in regions in contact with the antigen
- erythema, papules, crusts

Question 15

name the disease, cause, associated lesions, and any important pathomechanisms

Answer 15

pemphigus foliaceus
- a type II cytotoxic hypersensitivity
- destruction of desmosomes that hold keratinoytes together
- bulla, vesicles, pustules, ulcers
- on the nose, pinna, periocular skin, footpads, coronary band