Microbiology Chapter 21 Test Questions – Flashcards
Unlock all answers in this set
Unlock answersquestion
All of the following are normal microbiota of the skin EXCEPT A) Streptococcus. B) Micrococcus. C) Staphylococcus. D) Propionibacterium E) Corynebacterium
answer
streptococcus
question
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? A) chickenpox B) measles C) fever blisters D) scabies E) rubella
answer
chickenpox
question
Which of the following is NOT true of acne? A) It can be treated by eliminating fatty foods from the diet. B) It is often due to the action of Propionibacterium. C) Drugs that inhibit sebum formation are useful in treating inflammatory acne. D) Mild cases are treated with topical agents. E) Antibiotics may be prescribed for moderate cases
answer
it can be treated by eliminating fatty foods from the diet
question
Warts are caused by A) papillomavirus. B) poxvirus. C) herpesvirus. D) parvovirus
answer
papillomavirus
question
All of the following are characteristic of Pseudomonas aeruginosa EXCEPT A) gram-positive cell wall. B) resistance to many types of disinfectants and antibiotics. C) growth in moist environments. D) production of pyocyanin. E) rod-shaped
answer
gram-positive cell wall
question
Koplik spots are a diagnostic indicator of A) chickenpox. B) smallpox. C) fifth disease. D) rubella. E) measles.
answer
measles
question
All of the following are transmitted via the respiratory route EXCEPT A) smallpox. B) chickenpox. C) rubella. D) tinea. E) measles
answer
tinea
question
All of the following are protective factors of the skin and its secretions EXCEPT A) keratin. B) tightly packed cells. C) lysozyme production. D) pyocyanin production. E) salt.
answer
pyocyanin production
question
Thrush and vaginitis are caused by A) herpesvirus. B) Chlamydia trachomatis. C) Candida albicans. D) Staphylococcus aureus. E) Streptococcus pyogenes
answer
candida albicans
question
The greatest single cause of blindness in the world is A) neonatal gonorrheal ophthalmia. B) keratoconjunctivitis. C) trachoma. D) inclusion conjunctivitis. E) pinkeye.
answer
trachoma
question
All of the following are characteristic of the Group A beta-hemolytic streptococci EXCEPT A) methicillin resistance. B) M proteins. C) the ability to damage cell membranes. D) the ability to dissolve blood clots. E) hyaluronidase production
answer
methicillin resistance
question
Which of the following cause(s) ringworm? A) Microsporum B) Epidermophyton C) Mycobacterium D) Microsporum and Epidermophyton E) Microsporum, Epidermophyton, and Mycobacterium
answer
microsporum and epidermophyton
question
Newborns' eyes are treated with an antibiotic A) when Neisseria gonorrhoeae is isolated from the eyes. B) when the mother is blind. C) when the mother has genital herpes. D) when the mother has gonorrhea. E) as a routine precaution.
answer
as a routine precaution
question
A possible complication of chickenpox is A) encephalitis. B) fever blisters. C) subacute sclerosing panencephalitis. D) congenital rubella syndrome. E) macular rash.
answer
encephalitis
question
Which of the following is a subcutaneous mycosis? A) tinea capitis. B) sporotrichosis. C) erysipelas. D) athlete's foot. E) Buruli ulcer
answer
sporotrichosis
question
Which region of the skin supports the largest bacterial population? A) armpits B) scalp C) forearms D) feet E) All of these support similarly sized bacterial populations
answer
armpits
question
Staphylococcus aureus is responsible for all of the following EXCEPT A) pimples. B) sties. C) boils. D) carbuncles. E) acne.
answer
acne
question
Exfoliative toxin is responsible for A) otitis externa. B) impetigo. C) fever blisters. D) scalded skin syndrome. E) thrush
answer
scalded skin syndrome
question
All of the following are causative agents of conjunctivitis EXCEPT A) Chlamydia trachomatis. B) herpes simplex. C) adenovirus. D) Neisseria gonorrhoeae. E) Haemophilus influenzae
answer
herpes simplex
question
In which of the following respects is measles similar to German measles (rubella)? A) They have a similar type of rash. B) They are caused by the same virus. C) Encephalitis is a possible complication. D) Congenital complications may occur. E) They can be controlled by vaccination
answer
they can be controlled by vaccination
question
Why is vaccination for rubella recommended? A) It has a high mortality rate in school-age children. B) Death from secondary infections is common. C) There is a high incidence of congenital infections and birth defects. D) Health care workers have a high incidence of infection. E) It is no longer recommended; rubella has been eradicated
answer
there is a high incidence of congenital infections and birth defects
question
Which of the following statements about congenital rubella syndrome is FALSE? A) It is contracted during the first trimester of pregnancy. B) It may be fatal to the unborn child. C) It may result in deafness, blindness, and mental retardation. D) It does not occur with subclinical infections. E) It can be prevented by vaccinating women prior to pregnancy
answer
it does not occur with subclinical infections
question
Which of the following are incorrectly matched? A) varicella-zoster — chickenpox B) parvovirus — fifth disease C) HHV-6 — roseola D) herpes zoster — shingles E) poxvirus — fever blisters
answer
poxvirus - fever blisters
question
Which of the following is NOT caused by HSV-1? A) cold sores B) canker sores C) herpes gladiatorum D) herpes whitlow E) herpes encephalitis
answer
canker sores
question
Which of the following statements about Reye syndrome is FALSE? A) It is associated with aspirin use. B) It is a complication that may occur in chickenpox infection. C) It mostly affects older adults. D) Symptoms may include vomiting, drowsiness, or behavior changes. E) Prolonged neurological problems may occur.
answer
it mostly affects older adults
question
The eradication of smallpox was possible because A) it was a relatively mild disease. B) insect vectors were eliminated. C) there are no animal reservoirs of the virus. D) it can be prevented with the same vaccine used to prevent chickenpox. E) it occurs only in the tropic
answer
there are no animal reservoirs of the virus
question
Which of the following is used to treat herpetic keratitis? A) penicillin B) sulfonamide C) trifluridine D) fungicide E) acyclovir
answer
trifluridine
question
Which of the following is used to treat shingles? A) penicillin B) sulfonamide C) trifluridine D) fungicide E) acyclovir
answer
acyclovir
question
Which of the following is used to treat sporotrichosis? A) penicillin B) sulfonamide C) trifluridine D) oral potassium iodide E) acyclovir
answer
oral potassium iodide
question
Which of the following is used to treat candidiasis of the skin or mucous membranes? A) penicillin B) sulfonamide C) trifluridine D) miconazole E) acyclovir
answer
miconazole
question
Scabies is a skin disease caused by a A) slow virus. B) protozoan. C) mite. D) bacterium. E) prion
answer
mite
question
Scabies is transmitted by A) fomites. B) food. C) water. D) soil. E) respiratory secretions
answer
fomites
question
A patient has pus-filled vesicles and scabs on her face, throat, and lower back. She most likely has A) measles. B) mumps. C) chickenpox. D) rubella. E) smallpox
answer
chickenpox
question
Which of the following leads to all the others? A) toxemia B) scalded skin syndrome C) staphylococcal infection D) TSST-1 E) sudden drop in blood pressure
answer
staphylococcal infection
question
Buruli ulcer is caused by A) gram-positive bacteria. B) acid-fast bacteria. C) a fungus. D) a virus. E) a mite
answer
acid-fast bacteria
question
The patient has a papular rash. Microscopic examination of skin scrapings reveals small eight-legged animals. The etiology is A) Candida. B) Microsporum. C) Pseudomonas aeruginosa. D) Staphylococcus aureus. E) Sarcoptes
answer
sarcoptes
question
The patient has vesicles and scabs over her forehead. Microscopic examination of skin scrapings shows gram-positive cocci in clusters. The etiology is A) Candida. B) Microsporum. C) Pseudomonas aeruginosa. D) Staphylococcus aureus. E) Sarcoptes.
answer
staphylococcus areus
question
The patient has scaling skin on his fingers. Conidiospores are seen in microscopic examination of skin scrapings. The etiology is A) Candida. B) Microsporum. C) Pseudomonas aeruginosa. D) Staphylococcus aureus. E) Mycobacterium ulcerans
answer
microsporum
question
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 A) Candida albicans. B) herpes simplex virus. C) Staphylococcus aureus. D) Streptococcus pyogenes. E) varicella-zoster virus
answer
varicella-zoster virus
question
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 A) Candida albicans. B) herpes simplex virus. C) Staphylococcus aureus. D) Streptococcus pyogenes. E) varicella-zoster virus
answer
candida albicans
question
Which of the following is incorrectly matched? A) Haemophilus influenzae — pinkeye B) Chlamydia trachomatis — trachoma C) Neisseria gonorrhea — opthalmia neonatorum D) Acanthamoeba — keratitis E) Pseudomonas — inclusion conjunctivitis
answer
pseudomonas - inclusion conjunctivitis
question
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 A) an acid-fast reaction. B) a coagulase reaction. C) conidiospores. D) pseudohyphae. E) pseudopods
answer
a coagulase reaction
question
Which of the following pairs is mismatched? A) chickenpox — poxvirus B) conjunctivitis — Chlamydia trachomatis C) keratitis — Acanthamoeba D) otitis externa - Pseudomonas E) Buruli ulcer — Mycobacterium
answer
chickenpox - poxivirus
question
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 A) Acanthamoeba. B) herpes simplex virus. C) Propionibacterium acnes. D) Staphylococcus aureus. E) Streptococcus pyogenes
answer
propionibacterium acnes
question
Which of the following is likely to spread MRSA among athletes? A) physical contact B) whirlpool baths C) taping gels D) shared equipment E) All of the answers are correct
answer
all of the answers are correct
question
Inflammation of the thin clear membrane lining the eyelid and eye is properly termed A) keratititis B) trachoma C) ophthalmia neonatorum D) conjunctivitis E) whitlow
answer
conjunctivitis
question
Pathogens of the skin often enter via hair follicles and ducts of the sweat glands.
answer
True
question
The majority of the staphylococci isolated from human skin are coagulase-positive.
answer
False
question
The abbreviation "GAS" refers to pathogenic strains of Staphylococcus.
answer
False
question
Haemophilus influenzae is the most common bacterial cause of pinkeye.
answer
True
question
Candidiasis often occurs following antibiotic therapy for bacterial infections.
answer
True
question
Infection with Pediculus humanus is called scabies.
answer
False
question
Blue-green pus is characteristic of Pseudomonas wound infections.
answer
True
question
The normal flora of the skin is predominantly gram-negative rods.
answer
False
question
Acanthamoeba infections are usually transmitted via insects.
answer
False
question
The varicella-zoster virus is the causative agent of chickenpox and shingles.
answer
True
question
All of the following are protective factors of the skin and its secretions except
answer
pyocynanin production
question
Which region of the skin supports the largest bacterial population?
answer
armpits
question
Warts are caused by
answer
papillomavirus
question
A possible complication of chickenpox is
answer
candida albicans
question
Thrush and vaginitis are caused by
answer
measles
question
Staphylococcus aureus is responsible for all of the following EXCEPT
answer
encephalitis
question
Why is vaccination for rubella recommended?
answer
there is a high incidence of congenital infections and birth defects
question
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
answer
propionibacterium acnes
question
The greatest single cause of blindness in the world is
answer
trachoma
question
Infants may acquire a serious form of conjunctivitis during birth if they are born to a mother infected with
answer
neisseria gonorrhoeae
question
Which statement regarding the skin is false?
answer
sweat glands produce sebum in addition to sweat
question
Fluoroquinolones are the treatment prescribed for otitis externa, which is due to a
answer
bacterial infection
question
Pathogens of the skin often enter via hair follicles and ducts of the sweat glands
answer
true
question
All of the following are characteristic of Pseudomonas aeruginosa EXCEPT
answer
gram-positive cell wall
question
Which of the following statements about congenital rubella syndrome is false?
answer
it does not occur with subclinical infections
question
In which of the following respects is measles similar to German measles (rubella)?
answer
they can be controlled by vaccination
question
Which of the following is NOT true of acne?
answer
it can be treated by eliminating fatty foods from the diet
question
All of the following are characteristic of the Group A beta-hemolytic streptococci EXCEPT
answer
methicillian resistance
question
Which of the following pairs is mismatched?
answer
chickenpox poxvirus
question
The abbreviation "GAS" refers to pathogenic strains of Staphylococcus
answer
false
question
Which of the following leads to all the others?
answer
staphylococcal infection
question
Which of the following are incorrectly matched?
answer
poxvirus fever blisters
question
Which of the following is NOT caused by HSV-1?
answer
canker sores
question
The eradication of smallpox was possible because
answer
there are no animal reservoirs of the virus
question
Which of the following is used to treat shingles?
answer
acyclovir
question
Which statement correctly describes the normal microbiota of the skin?
answer
the skin's normal microbiota are capable of growth at elevated salt concentrations
question
Blue-green pus is a characteristic of Pseudomonas wound infections
answer
true
question
The patient has vesicles and scabs over her forehead, Microscopic examination of skin scrapings shows gram-positive cocci in clusters. The etiology is
answer
staphylococcus aureus
question
Exfoliative toxin is responsible for
answer
scalded skin syndrome
question
The varicella-zoster virus is the causative agent of chickenpox and shingles
answer
true
question
Haemophilus influenza is the most common bacterial cause of pinkeye
answer
true
question
Inflammation of the thin clear membrane lining the eyelid and eye is properly termed
answer
conjunctivitis
