Dermatophytes Flashcards
__________ is a superficial fungal infection involving the keratinized layers of the skin and its appendages (hair, nails, horns, feathers etc
Ringworm
T/F Ringworm is able to pentrate all layers of skin, and in severe infections/immunocompromised animals will penetrare deeper structures and can result in death in extreme cases
FALSE it is self limiting, cannot penetrate deeper, anmd doesnt cause death
What are the # general characteristics of a dermatophyte infection?
Spreads from single point
invasion of hair and skin
organism unable to survive the inflammatory reaction and moves peripherally creating the classical ringed lesions of alopecia w/ central healing and peripheral inflammation
__________ is and old Roman term referring to insects and their larva
Tinea
T/F perfect states of dermatophytes are easy to demonstrate
False, difficult, named on their habitat where most likely to be found
__________ inhabit soil, free living saprophytes infect animals or man and produce dermatopytosis
Geophilic
__________ normally found as parasites of animals but some can also infect humans
Zoophilic
__________ are dermatophytes that infect humans
Anthropophilic
What clinical disease is caused by all dermatophytes?
hydrolyze keratin and damge the epidermis and hair follicles, hypersensitivity develops to fungal allergen which contributes to the irritation
__________ is the major component of dermatophyte disease
hypersensitivity
T/F secondary bacterial infections are rarely observed with dermatophyte infections
FALSE
__________ are used to visualize fungal elements
KOH mounts
What 5 things are used to identify dermatophytes?
rate of growth
color of colony
surface texture
surface topography
presence and characteristics of macroconidia, microconidia, and other specialized structues
