Lecture 2 Flashcards
Most common external parasite
Flea
Most common skin disease
FAD
Most common flea in dogs and cats
Ctenocephalides felis
Avian stick tight flea
Echidnophagia gallinacea
Exposure to birds or poultry farms; seen on margin of pinnae
Diseases of fleas
Plague, murine typhus, tularemia, dipylidium caninum, cat scratch fever
Length of flea life cycle
3 wks
Eggs- where at? Resistant to what?
Laid after bloodmeal into environment
Resistant to everything except IGR
Larva- where at? What do they like? What do they eat?
Environment
Like dark warm areas
Eat flea dirt
Most resistant stage of flea
Cocoon/pupa
Can be dormant for months
What makes pupa come out
Vibrations
Predisposing factors to FAD
Lack of exposure at young age
Intermittent exposure
Small amounts
Atopy
Hypersensitivity of FAD
Type I and IV
Cutaneous basophil hypersensitivity
Primary lesion of FAD
Papule
What will you see with FAD
Self trauma and absence of fleas usually
Three most pruritic diseases in dogs
FAD, food, scabies
