Ch 21 Quiz Flashcards

All of the following are normal microbiota of the skin EXCEPT

-Streptococcus.

-Staphylococcus.

-Corynebacterium.

-Micrococcus.

-Propionibacterium.

An eight-year-old girl has scabs and pus-filled vesicles on her face and throat. Three weeks earlier she had visited her grandmother who had shingles. What infection does the eight-year-old have?

-fever blisters

-chickenpox

-measles

-scabies

-rubella

Which of the following is NOT true of acne?

-Mild cases are treated with topical agents.

-Antibiotics may be prescribed for moderate cases.

-Drugs that inhibit sebum formation are useful in treating inflammatory acne.

-It is often due to the action of Propionibacterium.

-It can be treated by eliminating fatty foods from the diet.

Warts are caused by poxvirus.

-parvovirus.

-Staphylococcus aureus.

-papillomavirus.

-herpesvirus.

All of the following are characteristic of Pseudomonas aeruginosa EXCEPT

-growth in moist environments.

-production of pyocyanin.

-gram-positive cell wall.

-resistance to many types of disinfectants and antibiotics.

-rod-shaped.

Koplik spots are a diagnostic indicator of

-fifth disease.

rubella.

-measles.

-chickenpox.

-smallpox.

All of the following are transmitted via the respiratory route EXCEPT

-tinea.

-rubella.

-measles.

-chickenpox.

- smallpox.

All of the following are protective factors of the skin and its secretions EXCEPT

-pyocyanin production

. -salt.

-lysozyme production.

-keratin.

-tightly packed cells.

Thrush and vaginitis are caused by

herpesvirus.
Staphylococcus aureus.
Chlamydia trachomatis.
Candida albicans.
Streptococcus pyogenes.

The greatest single cause of blindness in the world is

neonatal gonorrheal ophthalmia.
keratoconjunctivitis.
inclusion conjunctivitis.
trachoma.
pinkeye.

all of the following are characteristic of the Group A beta-hemolytic streptococci EXCEPT

the ability to dissolve blood clots.
M proteins.
hyaluronidase production.
the ability to damage cell membranes.
methicillin resistance.

Which of the following cause(s) ringworm?

Mycobacterium
Microsporum, Epidermophyton, and Mycobacterium
Microsporum
Microsporum and Epidermophyton
Epidermophyton

Newborns' eyes are treated with an antibiotic

when the mother has genital herpes.
when Neisseria gonorrhoeae is isolated from the eyes.
when the mother is blind.
when the mother has gonorrhea.
as a routine precaution.

A possible complication of chickenpox is

subacute sclerosing panencephalitis.
encephalitis.
congenital rubella syndrome.
fever blisters.
macular rash.

Which of the following is a subcutaneous mycosis?

athlete's foot
tinea capitis
sporotrichosis
Buruli ulcer
erysipelas

Which region of the skin supports the largest bacterial population?

forearms
scalp
feet
armpits
All of these support similarly sized bacterial populations.

Staphylococcus aureus is responsible for all of the following EXCEPT

acne.
boils.
pimples.
sties.
carbuncles.

Exfoliative toxin is responsible for

scalded skin syndrome.
otitis externa.
fever blisters.
impetigo.
thrush.

All of the following are causative agents of conjunctivitis EXCEPT

Chlamydia trachomatis.
Haemophilus influenzae.
adenovirus.
herpes simplex.
Neisseria gonorrhoeae.

In which of the following respects is measles similar to German measles (rubella)?

They are caused by the same virus.
They can be controlled by vaccination.
Congenital complications may occur.
They have a similar type of rash.
Encephalitis is a possible complication.

Why is vaccination for rubella recommended?

It is no longer recommended; rubella has been eradicated.
There is a high incidence of congenital infections and birth defects.
Health care workers have a high incidence of infection.
It has a high mortality rate in school-age children.
Death from secondary infections is common.

Which of the following statements about congenital rubella syndrome is FALSE?

It does not occur with subclinical infections.
It can be prevented by vaccinating women prior to pregnancy.
It may be fatal to the unborn child.
It is contracted during the first trimester of pregnancy.
It may result in deafness, blindness, and mental retardation.

Which of the following are incorrectly matched?

parvovirus – fifth disease
herpes zoster – shingles
HHV-6 – roseola
varicella-zoster – chickenpox
poxvirus – fever blisters

Which of the following is NOT caused by HSV-1?

herpes whitlow
canker sores
cold sores
herpes encephalitis
herpes gladiatorum

Which of the following statements about Reye syndrome is FALSE?

It is a complication that may occur in chickenpox infection.
Symptoms may include vomiting, drowsiness, or behavior changes.
It mostly affects older adults.
Prolonged neurological problems may occur.
It is associated with aspirin use.

The eradication of smallpox was possible because

it occurs only in the tropics.
insect vectors were eliminated.
there are no animal reservoirs of the virus.
it was a relatively mild disease.
it can be prevented with the same vaccine used to prevent chickenpox.

Which of the following is used to treat herpetic keratitis?

trifluridine
penicillin
fungicide
sulfonamide
acyclovir

Which of the following is used to treat shingles?

penicillin
acyclovir
trifluridine
sulfonamide
fungicide

Which of the following is used to treat sporotrichosis?

acyclovir
oral potassium iodide
trifluridine
penicillin
sulfonamide

Which of the following is used to treat candidiasis of the skin or mucous membranes?

acyclovir
trifluridine
penicillin
miconazole
sulfonamide

Scabies is a skin disease caused by a

prion.
mite.
slow virus.
bacterium.
protozoan.

Scabies is transmitted by

soil.
fomites.
food.
water.
respiratory secretions.

A patient has pus-filled vesicles and scabs on her face, throat, and lower back. She most likely has

measles.
rubella.
chickenpox.
smallpox.
mumps.

Furuncles, toxic shock syndrome, and scalded skin syndrome all are caused by

Staphylococcus aureus.
Pseudomonas aeruginosa.
Candida albicans.
Propionibacterium acnes.
Streptococcus pyogenes.

Buruli ulcer is caused by

a fungus.
a mite.
a virus.
acid-fast bacteria.
gram-positive bacteria.

The patient has a papular rash. Microscopic examination of skin scrapings reveals small eight-legged animals. The etiology is

Candida.
Microsporum.
Pseudomonas aeruginosa.
Staphylococcus aureus.
Sarcoptes.

The patient has vesicles and scabs over her forehead. Microscopic examination of skin scrapings shows gram-positive cocci in clusters. The etiology is

Candida.
Microsporum.
Pseudomonas aeruginosa.
Staphylococcus aureus.
Sarcoptes.

The patient has scaling skin on his fingers. Conidiospores are seen in microscopic examination of skin scrapings. The etiology is

Candida.
Microsporum.
Pseudomonas aeruginosa.
Staphylococcus aureus.
Mycobacterium ulcerans.

A 45-year-old man has pus-filled vesicles distributed over his back in the upper right quadrant, over his right shoulder, and upper right quadrant of his chest. His symptoms are most likely due to

Streptococcus pyogenes.
Staphylococcus aureus.
Candida albicans.
herpes simplex virus.
varicella-zoster virus.

A 35-year-old woman has a red, raised rash on the inside of her thighs. Gram-stained skin scrapings show large budding cells with pseudohyphae. The infection is caused by

Streptococcus pyogenes.
Staphylococcus aureus.
varicella-zoster virus.
herpes simplex virus.
Candida albicans.

Which of the following is incorrectly matched?

Haemophilus influenzae – pinkeye
Neisseria gonorrhea – opthalmia neonatorum
Acanthamoeba – keratitis
Pseudomonas – inclusion conjunctivitis
Chlamydia trachomatis – trachoma

Assume that your lab partner swabs the side of his face and uses the swab to inoculate a nutrient agar plate. The next day, he performs a Gram stain on the colonies. They are gram-positive cocci. You advise him that he should next look for

conidiospores.
pseudopods.
a coagulase reaction.
an acid-fast reaction.
pseudohyphae.

Which of the following pairs is mismatched?

conjunctivitis – Chlamydia trachomatis
Buruli ulcer – Mycobacterium
keratitis – Acanthamoeba
chickenpox – poxvirus
otitis externa - Pseudomonas

A 17-year-old boy has pus-filled cysts on his face and upper back. Microscopic examination reveals gram-positive rods. This infection is caused by

herpes simplex virus.
Acanthamoeba.
Streptococcus pyogenes.
Staphylococcus aureus.
Propionibacterium acnes.

Which of the following is likely to spread MRSA among athletes?

physical contact
shared equipment
taping gels
whirlpool baths
All of the answers are correct.

Inflammation of the thin clear membrane lining the eyelid and eye is properly termed

trachoma.
keratititis.
conjunctivitis.
ophthalmia neonatorum.
whitlow.

You are examining a scraping of an infected cornea under the brightfield microscope and see eukaryotic cells. This is probably a case of

Trichiasis.
Trachoma.
Acanthomoeba keratitis.
Herpetic keratitis.
Ophthalmia neonatorum.

Which disease commonly leads to blindness in parts of the world but can be largely controlled through sanitary practices and health education?

Herpetic keratitis
Yaws
Buruli ulcer
Trachoma
Acanthomoeba keratitis

Which infectious agent causes conjunctivitis and may be contracted from non-chlorinated swimming pools?

Simplexvirus
Chlamydia trachomatis
Treponema pallidum
Neisseria gonorrhoeae
Haemophilus influenzae

A newborn infant develops a whitish overgrowth on the tongue and inner lips. This newborn is suffering from an infection with

Trichophyton.
Candida albicans
Acanthomoeba.
Pediculus humanus.
Sporothrix schenkii.