Superficial & Cutaneous Mycoses Flashcards
what is another name for dermatophytosis or tinea
ringworm
what layer of the skin/hair does dermatophytosis infect
outermost
what protein do dermatophytes love
keratin
def? love keratin
keratinophilic
name of causative agent found in the soil
geophilic
name of causative agent found on humans
anthropophilic
name of causative agent found on animals
zoophilic
what layers of the skin make up the superficial layer (3)
keratinized, epidermis, and dermis
is ringworm a fungus or mold
fungus
what kind of rash do you get when you have ringworm
circular,
red, and itchy
what kind of fungi cause ringworm (common name)
dermatophytes
what specific fungi. cause ringworm (3)
trichophyton, microsporum, and epidermophyton
what enzyme do dermatophytes have that help them invade the epidermis
keratinases
what kind of hyphae do dermatophytes have (3)
septated, branched, and arthroconidia
do dermatophytes invade the hair shaft
sometimes
aka tinea or dermatophytosis
ringworm
what is it called when arthroconidia grow outside of the hair shaft
ectothrix
during an ectothrix infection is the hair cuticle destroyed
yes
if you have an ectothrix infection will it Florence under a woods lamp
yes
what is it called when arthroconidia grow outside and inside the hair shaft
ecto-endothrix
what is it called when arthroconidia grow inside of the hair shaft
endothrix
during an endothrix infection is the hair cuticle destroyed
no
if you have an endothrix infection will it Florence under a woods lamp
no
what is the most severe dermatophyte hair invasion
favus
what is another name for favus
honeycomb
what is it called when hyphae are at the base of hairs with air spaces in the hair shaft
favus
what is the name for head ringworm
tinea capitis
what is the name for feet ringworm
tinea pediis
what is the name for hand ringworm
tinea manuum
what is the name for groin ringworm
tinea cruris
what is the name for beard/mustache ringworm
tinea barbae
what is the name for finger/toenails ringworm
tinea unguium
what is the name for body ringworm
tinea corporis
what layer of the scalp does tinea capitis invade
stratum corneum layer
t or f: tinea capitis grows downward into the hair shaft
t
is inflammatory or non-inflammatory tinea capitis worse
inflammatory
what kind of tinea capitis has gray patches, black dots, and dandruff like
non-inflammatory
what kind of tinea capitis has hair loss, pustular, and crusted
inflammatory
how do you get tinea capitis
skin to skin, touching infected animals/objects
what organism causes favus
T. schoenleinii
what is another name for tinea pedis
athlete’s foot
how does tinea pedis spread to other parts of the body
scratching and picking
what is the most common type of ring worm
tinea pedis
what organism causes tinea manuum
t. rubrum
if someone has tinea pedis what other ringworm are they likely to have
tinea manuum
(ringworm) ___ foot, one ____ syndrome
2; hand
what kind of proteins does t. rubrum use to mediate the adherence to the epithelial tissue
mannan glycoproteins
how does t. rubric penetrate into skin
proteases
how does t. rubrum suppress lymphocyte response
cell wall mannan
what kind of ringworm is known as the jock itch
tinea cruris
why is the groin a good Environment for dermatophytes
moist and alkaline pH
what organism causes tinea cruris
t. rubrum
what kind of ringworm is known as barber’s itch
tinea barbae
what kind of tinea barbae is zoophilic
inflammatory
what kind of tinea barbae is anthropophilic
noninflammatory
what kind of tinea barbae is tender, weeping nodule, with pustules
inflammatory
what kind of tinea barbae is small, red, itchy bumps
noninflammatory
what is the major cause of onychomycosis
tinea unguium
def? a fungal nail infection caused by yeast or dermatophyte
onychomycosis
what kind of ringworm is the most difficult to treat
tinea unguium
what kind of organism causes tinea corporis
t rubrum
what kind of ringworm has a soil exposure
tinea corporis
what is name for body ringworm that athletes get
tinea corporis gladatorum
who does trichophyton rubrum infect
humans
what is the name of the microconidia of T. rubrum
birds-on-a-wire
Trichophyton mentagrophytes is predominantly what kind of exposure
zoophilic
does t. mentagrohytes have more macro or microsporidia
microsporidia
what kind of hyphae do T. mentagrophytes have
spiral
what kind of hair shaft invasion does T. mentagrophytes do
ecto-endothrix
what kind of hair shaft invasion does T. Tonsurans do
endothrix
what organism causes black-dot tinea capitis
T. tonsurans
what kind of spores does T. tonsurans have
chlamydospores
does t. tonsurans have more macro or microconidia
microconidia
what shape macrocondidia of microsporum canis
spindle
what is the shape of microconidia of microspourm Canis
narrow club shaped
what kind of hair shaft invasion does M. canis do
ectothrix
M. canis is predominantly what kind of exposure
zoophilic
what kind of animal host m. canis
cat
what color does m. canis fluoresce under woods lamp
blue green
does microsporum gypseum have more macro or microconidia
macroconidia
where do you find m. gypseum
soil
what kind of hair infection does m. gypseum do
ecto-endothrix
what is the shape of epidermophyton floccosum macroconidia
club-shaped
T or f: e. floccosum has microconidia
F
T or F: e. floccosum can form chlamydospores
T
what kind of hair invasion does e. floccosum do
none
def? superficial fungal infection of the hair shaft that presents as small nodules
piedra
what causes piedra
excessive use of hair oil
what organism causes white piedra (pubic)
t. inkin
what organism causes scalp white piedra
T ovoides
what organism causes black piedra
Piedraia hortae
what organism causes thrush
candida
who often gets thrush
immunosuppressed and babies
what organism causes tinea nigra
hortaea wernickii
what has hyper pigmented patch of infected skin
tinea nigra
what kind of environment does tinea nigra like
salty
what kind of Environment does malassezia like
lipid dependent
