1. All of the following are correct about Staphylococcusaureus, EXCEPT:
most strains are resistant to penicillin and ampicillin
it causes furuncles, carbuncles, and abscesses.
it is the coagulase-positive species
it is a common cause of strep throat
2. Acanthamoeba is NOT
a cause of keratitis
entering typically through broken skin or the conjunctiva
acquired by swimming in contaminated water
a heleminth
3. Fifth disease is normally
treated intensively with intravenous antibiotics
treated with topical antibiotic ointments
prevented through vaccination
allowed to resolve without treatment
4. The skin is an effective barrier against many pathogens. Allthe following describe ways that pathogens penetrate the skinEXCEPT for which one?
Helminths may burrow into the skin, creating their own paths todeeper tissues
Microbes may enter the body through skin that has been damaged,allowing them to reach deeper tissues
The loa loa worm enters the bloodstream through the bite of thedeerflies that carry it
Bacteria on the surface of the skin often gradually consume theepidermis and dermis, creating a pathway to deeper parts of thebody
5. All of the following are correct about Streptococcuspyogenes, EXCEPT
it causes scalded skin syndrome
humans are the only significant reservoir
some of the streptococcal toxins act as superantigens
infection is generally through direct contact
