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Homework 11

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All of the following are protective factors of the skin and its secretions EXCEPT
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pyocyanin production
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Which region of the skin supports the largest bacterial population?
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Armpits
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An eight-year-old has scabs and pus filled vesicles on her face and throat. Three weeks earlier she visited her grandmother, who has shingles. What infection does the eight-year-old have?
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Chickenpox
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All of the following are characteristics of Psuedomonas aeruginosa EXCEPT
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gram-positive cell walls
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Koplik spots are a diagnostic indicator of
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measles
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Thrush and vaginitis are caused by
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Candida albicans
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All of the following are characteristics of the Group A beta-hemolytic streptococci EXCEPT
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methicillin resistance
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Exfoliative toxin is responsible for
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Scalded Skin syndrome
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The eradication of smallpox was possible because
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there are no animal reservoirs of the virus
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Which of the following leads to all of the others?
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Staphylococcal infection leads to: – scalded skin syndrome – sudden drop in BP – toxemia – TSS
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The patient has a papular rash. Microscopic examination of skin scrapings reveals small, eight legged animals. The etiology is
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Sarcoptes
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The patient has vesicles and scabs over her forehead. Microscopic examination of the skin scrapings shows gram-positive cocci in clusters. The etiology is
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S. aureus
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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 psuedohyphae. The infection is caused by
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Candida albicans
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Which of the following is likely to spread MRSA among athletes?
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All of the answers are correct– taping gels, whirlpool baths, physical contact, shared equipment
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The majority of the staphylococci isolated from the human skin are coagulase-positive.
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False- they are coagulase-negative
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The abbreviation GAS refers to pathogenic strains of staphylococcus.
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False- it stands for “Group A Strep”
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Candidiasis often occurs following antibiotic therapy for bacterial infections.
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True- normal microbiota is killed by antibiotic therapy, so things such as thrush can more easily inhabit the area
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Newborns’ eyes are treated with an antibiotic
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as a routine precaution
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Acanthamoeba infections are usually transmitted via insects.
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False- occurs from poor hygiene and touching things such as your contacts and putting them in your eyes
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You have a culture of bacteria you suspect are either S. aureus or S. pyongenes. Is there any morphological difference between the two?
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Yes. S. aureus tends to grow in clusters, whereas S. pyogenes grow in chains.