Podiatric Medicine Exam 1 | UPDATED Questions with Correct Answers | Verified
Solutions
[...]% of the world's population will experience a cutaneous mycotic infection in their lifetimes.
[...]% of the population will have fungal infections of the feet. [...]% of those with tinea pedis
will have recurrent episodes for more than a decade.
70% ; 15% ; 45%
dermatophytes are pathogenic fungi that utilize an enzyme known as [...] in order to inhabit
[cold & dry/warm & moist] environments such as hair & nails. these organisms also invade
keratinized layers of the skin, particularly the [...]. infection is held in check via [...] & hardly
progresses past this layer unless one is [...]. we are to know that these organisms have an
average incubation period of [...] & cause a rash with a characteristic [...] pattern. in order to
determine if an individual has this, taking a skin scraping from the [...]
keratinase ; warm & moist ; stratum corneum ; cell-mediated immunity ; does not progresses
unless one is immunocompromised ; 1-3 week incubation period ; centrifugal pattern known as
"circular scaling" ; active scaling border (not the clear center)
the most prevalent mycotic skin infection worldwide is [...] which is primarily caused by the
organism known as [...], which is endemic to [...]. we are to know that this dermatophyte [is/is
not] aggressive, remains in the [...] of one's skin & causes recurrent infections because it [...].
this organism is unique in that it has cell wall glycoproteins which suppress [...], suppress [...] &
inhibit [...]. also know that this organism can survive as a [...].
tinea pedis ; trichophyton rubrum (90% of cases) ; endemic to Asia, Africa & Australia ; not
aggressive ; remains in stratum corneum ; evades immune surveillance
cell wall glycoproteins suppress inflammation, suppress cell-mediated immunity & inhibit
stratum corneum turnover
can survive as a spore, meaning it does not need to be on the human body to live ; can live on
household objects & latch onto human skin upon contact
,to burn it into your brain:
what is the most prevalent mycotic skin infection?
tinea pedis
(know that the word tinea is derived from the latin word which means gnawing worm)
what are the three types of tinea pedis?
dry & scaling
characterized by circular scaling lesions which may become confluent & give pattern of
generalized scaling ; commonly pruritic ; may assume a moccasin distribution but may also be
limited to interspaces where cracking & fissuring of skin are seen
vesicular
multiple pruritic vesicles, typically on soles ; more commonly caused by t. mentagrophytes ; can
be mistaken for dyshidrotic eczema ; take sample from skin where vesicle roof meets
surrounding skin
severe & erosive (erosio interdigitalis blastomycetica)
severe interdigital infection of interdigital webspaces that presents as an eroded erythematous
area surrounded by macerated skin ; can lead to secondary bacterial infx. that requires systemic
antibiotics
,Erosio Interdigitalis Blastomycetica
visualized
severe, wet interdigital form of tinea pedis w/ superimposed bacterial or candidate infection
systemic abx are needed for likely S. aureus & systemic antifungals (terbinafine) needed
what is interdigital maceration?
how do you treat it?
cutaneous candidiasis
also known as erosio interdigitalis blastomycetica
treatment
if wood's light shows coral red: c. minutissimum, treat with erythromycin
if wood's light does not show coral red: topical antifungal
wood's light is [...] nm.
, coral red is [...].
bright green is [...].
blue-green is [...].
gold is [...]
360
coral red: c. minutissimum
bright green: tinea capitis
blue-green: pseudomonas
gold: tinea versicolor
how do you diagnose dry & scaling tinea pedis versus vesicular tinea pedis?
dry & scaling: take a scraping from periphery of an annular lesion
vesicular: take sample from skin where vesicle roof meets the surrounding skin
list the organisms that most commonly cause mycotic nail infections.
dermatophytes (90%)
trichophyton rubrum & trichophyton mentagrophytes
yeasts (7%)
Candida albicans
Solutions
[...]% of the world's population will experience a cutaneous mycotic infection in their lifetimes.
[...]% of the population will have fungal infections of the feet. [...]% of those with tinea pedis
will have recurrent episodes for more than a decade.
70% ; 15% ; 45%
dermatophytes are pathogenic fungi that utilize an enzyme known as [...] in order to inhabit
[cold & dry/warm & moist] environments such as hair & nails. these organisms also invade
keratinized layers of the skin, particularly the [...]. infection is held in check via [...] & hardly
progresses past this layer unless one is [...]. we are to know that these organisms have an
average incubation period of [...] & cause a rash with a characteristic [...] pattern. in order to
determine if an individual has this, taking a skin scraping from the [...]
keratinase ; warm & moist ; stratum corneum ; cell-mediated immunity ; does not progresses
unless one is immunocompromised ; 1-3 week incubation period ; centrifugal pattern known as
"circular scaling" ; active scaling border (not the clear center)
the most prevalent mycotic skin infection worldwide is [...] which is primarily caused by the
organism known as [...], which is endemic to [...]. we are to know that this dermatophyte [is/is
not] aggressive, remains in the [...] of one's skin & causes recurrent infections because it [...].
this organism is unique in that it has cell wall glycoproteins which suppress [...], suppress [...] &
inhibit [...]. also know that this organism can survive as a [...].
tinea pedis ; trichophyton rubrum (90% of cases) ; endemic to Asia, Africa & Australia ; not
aggressive ; remains in stratum corneum ; evades immune surveillance
cell wall glycoproteins suppress inflammation, suppress cell-mediated immunity & inhibit
stratum corneum turnover
can survive as a spore, meaning it does not need to be on the human body to live ; can live on
household objects & latch onto human skin upon contact
,to burn it into your brain:
what is the most prevalent mycotic skin infection?
tinea pedis
(know that the word tinea is derived from the latin word which means gnawing worm)
what are the three types of tinea pedis?
dry & scaling
characterized by circular scaling lesions which may become confluent & give pattern of
generalized scaling ; commonly pruritic ; may assume a moccasin distribution but may also be
limited to interspaces where cracking & fissuring of skin are seen
vesicular
multiple pruritic vesicles, typically on soles ; more commonly caused by t. mentagrophytes ; can
be mistaken for dyshidrotic eczema ; take sample from skin where vesicle roof meets
surrounding skin
severe & erosive (erosio interdigitalis blastomycetica)
severe interdigital infection of interdigital webspaces that presents as an eroded erythematous
area surrounded by macerated skin ; can lead to secondary bacterial infx. that requires systemic
antibiotics
,Erosio Interdigitalis Blastomycetica
visualized
severe, wet interdigital form of tinea pedis w/ superimposed bacterial or candidate infection
systemic abx are needed for likely S. aureus & systemic antifungals (terbinafine) needed
what is interdigital maceration?
how do you treat it?
cutaneous candidiasis
also known as erosio interdigitalis blastomycetica
treatment
if wood's light shows coral red: c. minutissimum, treat with erythromycin
if wood's light does not show coral red: topical antifungal
wood's light is [...] nm.
, coral red is [...].
bright green is [...].
blue-green is [...].
gold is [...]
360
coral red: c. minutissimum
bright green: tinea capitis
blue-green: pseudomonas
gold: tinea versicolor
how do you diagnose dry & scaling tinea pedis versus vesicular tinea pedis?
dry & scaling: take a scraping from periphery of an annular lesion
vesicular: take sample from skin where vesicle roof meets the surrounding skin
list the organisms that most commonly cause mycotic nail infections.
dermatophytes (90%)
trichophyton rubrum & trichophyton mentagrophytes
yeasts (7%)
Candida albicans
