Flashcards in L59 Deck (23):
What are the 3 organisms most likely to cause dermatophyte infection?
1. Microsporum - WON'T cause tinea unguium
- More common worldwide cause
2. Epidermophyton - common cause of tinea cruris
3. Trichophyton - most common US cause
What diseases are caused by dermaphytes?
Tinea + body part
What are the 2 types of tinea capitis?
Ectothrix - outside --> in destruction
- Does not damage hair bulb, hair will likely grow back
Endothrix - infection starts inside the hair bulb --> out
Which bug usually causes endothrix tinea capitis?
T.tonsurans = US
Microsporum world wide
What patients usually get tinea capitis?
Treat tinea capitis
2. PO terbinafine
3. Wash everything that could be contaminated!
What are the 3 types of tinea pedis?
How do you get tinea corporis?
Direct body contact
- To humans: wrestlers
- To animals: horses
What is a tinea infection of the nails called?
How do you get/treat onychomycosis?
Can get independently or as a progression of other tinea infections (tinea pedis)
Treat with PO always! Need to penetrate the nail
If you're using terbinafine as your first choice anti-fungal in most cases when you need a PO drug, what is your second choice?
How do you treat most tineas (skin based infections)?
Topical: clotrimazole + miconazole
Add PO if severe
What bug causes tinea versicolor?
What are the symptoms of tinea versicolor?
If you scrape sample tinea versicolor, what do you see?
Spaghetti and meatballs
Treat tinea versicolor.
Shampoo + scrubbing
Dermophytes cause cutaneous mycoses. What is unique about this level of infection?
Will see inflammation b/c invading dermis - interacting with immune cells
What do microsporum look like under the microscope?
What are the 3 types of reservoirs for dematophyte infections?
Anthropophilic - humans
- Use us for our keratin!
- We fight off with cellular immunity
Zoophilic - animals
Geophilic - soil
Type of trichophyton that is most common cause of tinea pedis
Symptoms of tinea capitis
Inflam = scaling, alopecia
In tinea capitis - endothrix (T.tonsurans)
Result of cell mediated immune response
Severe inflam, hair loss, cervical lymphadenopathy