Self Trauma Flashcards
What do you need to know to decide if an animal is carrying out self trauma?
Frequency
Does it stop normal behaviours such as feeding or walking
How long does it last
Is there tissue damage
What is puritis?
Subjective sensation of itching the desire to scratch
It’s a symptom
Where are the itch receptors?
Dermo-epidermal junction or basal epidermist
Which is the most puritic skin diseases?
Superficial inflammatory diseases
Explain the itch threshold concept
There is a level of puritis that an animal can cope with, then when this level goes over the itch threshold the animal will display itching. You need to reduce the itch down to below the animals threshold - by treating one problem you may reduce to below threshold but not get underlying cause
Name some common parasitic causes of puritic disease
Surface mites - cheyletiella
Burrowing mites - sarcoptes
Trombicula n. - harvest mites
Name some microbial infections/overgrowth that causes puritic disease
Staphylococcus
Malassezia
Dermatophytes
Name some hypersensitivity disorders that cause puritic disease
FAD
Atopic dermatitis
Food hypersensitivity
Contact dermatitis
What are some less common disorders than can come with puritis?
Cornification/Metabolic Disorders
Neoplasia (epitheliotrophic lymphoma and MCT)
Drugs
Why can non putitic diseases look like they show puritis?
Secondary infections will cause puritis
What are the top causes of puritic skin diseases in a dog?
Parasitic (Scabies, other mites)
Microbial (Staph pyoderma, Malassezia)
Hypersensitivity (FAD, Atopic, Food)
What are the top causes of puritic skin diseases in a cat?
Parasitic (Cheyletiella, other mites)
Microbial (Bacterial, Malassezia, Dermatophytosis [ringowrm])
Hypersensitivity (FAD, Atopic, Food, Eosinophillic plaques)
What are the top causes of puritic skin diseases in horses?
Parasitic (chroioptes, other mites)
Microbial (Staph, Dermatophilus, Dermatophytosis)
Hypersensitivity (Insect bites, Atopic, Food?)
