Microbial Diseases Of Skin And Wounds Pt. 3 Flashcards
What is the term for the warts found on the soles of the feet?
Plantar warts
What is the term used for warts found on fingers and toes?
Seed warts
What is the term for warts found on the trunk, face, elbows, and knees?
Flat warts
What is the pathogen responsible for warts?
40 different varieties of human papillomavirus (HPV)
How are warts transmitted?
Via direct contact and fomites
What is the term used when warts spread from one location to another on the same person?
Autoinoculation
Are warts usually harmless?
Yes
What are the five classical childhood exanthems?
Rubeola (Measles), scarlet fever, rubella (German measles), erythema infectiosum, roseola
What is the cause of rubeola (Measles)?
Measles virus
What is the cause of scarlet fever?
Streptococcus pyogenes
What is the cause of rubella (German measles)?
Rubella virus
What is the cause of erythema infectiosum?
Parvovirus B19
What is the cause of roseola?
HHV-6
Which “number disease” of children exanthems is still commonly used?
“Fifth disease”
What are all of the other names for measles?
First disease, red measles, rubeola
What sign is diagnostic for measles?
Koplik’s spots
What are the rare serious complications of measles that can result?
Pneumonia, encephalitis, and subacute sclerosing panencephalitis (SSPE)
Is measles highly contagious?
Yes
When are those with measles contagious?
Four days pre-rash and four days after rash appears
How is measles spread?
Respiratory droplets
What species is the only host for measles?
Humans
What is the treatment for measles?
There aren’t any
How can measles be prevented?
MMR vaccine
What is another nickname for rubella or German measles?
3-day measles
Are rubella infections serious in children?
Usually not
What can result from an adult developing rubella?
Arthritis or encephalitis
How can rubella be extremely dangerous for fetuses?
Infection of pregnant women can cause birth defects or death of fetus (“Congenital Rubella Syndrome”)
How is rubella spread?
Respiratory secretions
What is the treatment for rubella?
Rest, fluids, medication
Spontaneous abortion occurs in what amount of all congenital rubella syndrome cases?
20%
What is fifth disease?
Erythema infectiosum
What is the lay term for erythema infectiosum?
Slapped cheek syndrome
What is the pathogen responsible for erythema infectiosum?
Parvovirus B19
What condition is a respiratory disease that manifests as a rash that appears as a slap in the face?
Erythema infectiosum
How is erythema infectiosum transmitted?
Respiratory droplets
At what point is erythema infectiosum no longer infectious?
Once the rash is present
What condition is characterized by a rose-colored rash and mononucleosis-like symptoms?
Roseola
What is the pathogen responsible for roseola?
HHV-6
HHV-6 may make individuals more susceptible to what disease?
AIDS
Roseola may be linked to what other condition?
Multiple Sclerosis
How is roseola spread?
Person to person by transfer of oral secretions
What is the term for a disease caused by a fungus?
Mycosis
Are mycoses usually contagious?
No
What fungal infection of the hair shaft forms irregular nodules?
Piedra
What are the two types of piedra?
Black - hard, black nodules
White - soft, gray to white nodules
What is another name for pityriasis versicolor?
Tinea versicolor
What is the pathogen responsible for causing black piedra?
Piedraia hortae
What is the pathogen responsible for causing white piedra?
Trichisporon beigelii
What is the pathogen responsible for causing pityriasis?
Malassezia furfur
What fungal infection results in hypo- or hyper-pigmentation of patches of scaly skin that typically occurs on the trunk, shoulders, and arms?
Pityriasis versicolor
Pityriasis versicolor is unlikely to occur in which locations?
Face and neck (in that case, most likely would be vitiligo)
Pityriasis versicolor is now associated with what common cosmetic activity?
Tanning beds
How is piedra often transmitted?
Shared hair brushes and combs
How are superficial mycoses usually transmitted?
Person to person contact or environmental exposure
How is piedra treated?
By shaving infected hair
How is pityriasis versicolor diagnosed?
By the green color seen under UV light
How is pityriasis versicolor treated?
Topical or oral drugs
What are dermatophytes?
Specific groupings of fungi (not a Genus name) that cause cutaneous infections
How are dermatophyses often transmitted?
Via fomites
What was the old term for dermatophyses?
Ringworm
Why do we know longer call dermatophyses “ringworm”?
There is no actual worm involved; it is a fungal infection
What procedure confirms dermatophytoses diagnoses?
KOH preparation of skin or nail samples
What stimuli make dermatophytoses more aggravated?
Heat and moisture
What is the condition commonly known as “athlete’s foot”?
Tinea pedis
What is the condition commonly known as “jock itch”?
Tinea cruris
What dermatophysis occurs as a fungal infection of the nails?
Tinea unguium/ onychomycosis
What dermatophysis is associated with the trunk and overall body?
Tinea corporis
What dermatophysis is associated with the scalp?
Tinea capitis
What condition is also known as the rose-gardener’s disease?
Sporotrichosis
What is the pathogen responsible for causing sporotrichosis?
Sporothrix schenckii
Sporotrichosis usually occurs where on the body?
Arms and legs
What population of people are more at risk of developing sporotrichosis?
Anyone working with plant material (planters, gardeners, farmers)
What condition results from secondary lesions occurring on the skin along the course of lymphatic vessels following infection of sporotrichosis?
Lymphocutaneous sporotrichosis
In which direction does lymphocutaneous sporotrichosis travel?
Distal to proximal along the course of the lymphatics
Is leishmaniasis painful?
No
What are the signs and symptoms of cutaneous leishmaniasis?
Large painless skin lesions
What are the signs and symptoms of mucocutaneous leishmaniasis?
Skin lesions enlarged to encompass mucous membranes
What are the signs and symptoms of visceral leishmaniasis?
Parasite is spread by macrophages throughout the body and can end up damaging organs
What is the causative agent for leishmaniasis?
Leishmania
In what locations is leishmaniasis endemic?
Tropics and subtropics
What is the reservoir for leishmaniasis?
Dogs
What is the vector that transmits leishmaniasis to humans?
Sand flies
What is the other name for visceral leishmaniasis?
Kala-azar
What age group usually gets tinea unguium?
Elderly
What are the signs and symptoms for scabies?
Intense itching and rash of small, red, linear bumps (burrows or tunnels are sometimes seen)
What is the causative agent for scabies?
Sarcoptes scabiei (mite)
How is scabies transmitted?
Prolonged bodily contact
In what condition do scabies epidemics tend to occur?
Among those in crowded conditions
How is scabies treated?
Mite-killing lotions, antihistamines for itching