(20) - Large Animal Dermatophytosis

Question 1

1. Dermatophytosis occurs in what age horse? cow?

2. Zoonotic?

Answer 1

1. under 4 years, <1 year old

2. yessir

Question 2

1. Typical lesions of dermatophytosis in horses are characterized by what?
2. In horses, lesions are often seen where?
3. Initially, lesions may look like what?

Answer 2

1. multifocal areas of alopecia, scaling and crusting.
2. in the saddle and girth regions.
3. urticarial-like swellings.

Question 3

1. Wood’s lamp will give a negative result in most cases. Remember, only a proportion of
   Microsporum canis and Microsporum equinum strains fluoresce under the Wood’s lamp!
2. What is the most reliable diagnostic tool?
3. Pluck broken hairs localized within and close to the periphery of the lesion for fungal culture
   and also for direct examination.
4. Trichophyton equinum requires what? and Trichophyton verrucosum requireswhat to grow in culture media?

Answer 3

2. fungal culture

4. nicotinic acid; thiamine and inositol

Question 4

1. Most cases will heal spontaneously in 1 to 3 months unless what?
2. The goal of the treatment is to decrease the course and severity of the disease, prevent
   spread of the infection, and decrease environmental contamination.
3. Treatment includes fungicidal therapy for the animal and decontamination of the environment
   (tack, brushes, blankets, etc).
4. treat all contact animals
5. affected animals should be treated first or last?

Answer 4

1. the animal is debilitated by illness,
   parasites, malnutrition, etc.
2. last