Exam 2: Dermatophytes Flashcards
Fungal parasites of keratinized epithelium of skin and nails
Dermatophytes
What is an example of Dermatophytes?
- Ringworm (tinea)
T/F Dermatophytes are zoonotic and highly contagious
T
Who is predisposed to Dermatophytes infection?
youth, poor nutrition, high humidity, rubbing, low UV light
What are the 3 reservoirs for dermatophytes
- Anthropophilic- Human reservoir
- Zoophilic- Animal
- Geophilic- Soil or environ.
What are the 3 types of dermatophytes that infect dogs, cats, and humans
- Microsporum canis
- M. Audouinii
- M. gypsium
What is the type of dermatophyte that has the broadest host range?
Trichophyton mentagrophytes
What type of dermatophytes infects cattle?
Trichophyton verrucosum
What type of dermatophytes infects horses?
Trichophyton equinum
What type of dermatophytes infects pigs?
Microsporum nanum
T/F. cats may act as asymptomatic carriers of Microsporum canis
T
Nodular lesions caused by dermatophytes. Localized or generalized folliculitis and often with furunculosis
Kerion
Avian ringworm that often affects the comb and wattles
Microsporum gallinae (favus)
T/F there are vaccines available for ringworm in dogs?
F. cats and cattle only
Which of the following is incorrect about dermatophytes?
a. They cause superficial skin infections
b. They have affinity to keratanized epithelium
c. They are zoonotic
d. Systemic infections may occur
D. systemic infections may occur
ID the correct dermatophyte host pair
a. T. verrucossum- Horse
b. T. mentagrophyte- cattle
c. M. canis- cat
d. M. nanum- dog
C. M. canis- cats
Which of the following statement is incorrect?
a. M. canis can cause pseudomycetoma in persian cats
b. Griseofulvin is effective against dermatophytes
c. The sample for diagnostic testing should be collected from the center of the lesion
d. Cats are asymptomatic carriers of M. canis
C.
Wood lamp fluorescence is used for the dx of:
a. M. canis
b. M. nanum
c. T. verucossum
d. T. mentagrophytes
a. M. canis
