Virulent strains of Staphylococcus aureus can resist penicillin because they produce
a) a slime layer
b) lipase
c) beta-lactamase
d) coagulase
e) staphylokinase
Answer: C
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Microbiology Chapter 19
- In pregnant women, roseola infection can result in teratogenic birth defects.
- Herpesvirus infections can be controlled with chemotherapeutic agents.
- Smallpox vaccination was originally discontinued in the 1980's because of adverse effects of the vaccine.
- Chromoblastomycosis is rarely a severe disease and can be treated easily with appropriate drugs.
- Because they are common soil saprobes, dermatophytes are fungi that are not contagious in humans.
- Humans are the only hosts of Rickettsia rickettsii.
- M protein is a virulence factor associated with group A streptococci.
- Clostridium perfringens causes necrotizing fasciitis.
- Mucocutaneous leishmaniasis, also known as kala-azar, is fatal in 100% of untreated cases.
- A sample from an abscess is stained and examined under the microscope. A Gram stain appears uniformly pink, but a GMS (Gomori methenamine sliver) stain reveals brownish filaments in the sample. These findings suggest
- A child has a rash on the face, arms, upper legs and torso that is splotchy, and intensifies after being in the sun. The child does not complain of fever or itchiness. The signs and symptoms are consistent with
- The rash described as "teardrops on rose petals" is characteristic of
- Which of the following bacterial pathogens is an intracellular parasite?
- Which of the following is/are anti-phagocytic?
- A pigment produced by an opportunistic pathogen that contributes to tissue damage is
- A small puncture wound on a woman's arm has become swollen, hot to the touch, and intensely painful. There is tissue necrosis, but it is not "gassy," and under the microscope Gram-positive cocci in chains are present. Which of the following microbes is likely to be responsible?
- Which of the following forms of leishmaniasis is typically fatal?
- A child complains of intensely itchy "pimples" on the hands and wrists. The lesions are small inflamed streaks, but do not appear to contain pus. The child's condition may be the result of infection with
- A man is suffering severe foot pain in the area of what looks like a large wart. He reports he has had the wart for some time, and the pain and swelling have developed slowly. A sample from the lesion shows that the pus contains large cells that stain a golden brown color. The man is likely suffering from
- Sporotrichosis is more commonly known as
- Ultraviolet illumination is the quickest way to diagnose infections of which of the following?
- "Ringworm" is caused by
- Which of the following is becoming rarer as a result of childhood vaccinations?
- Which of the following is an INCORRECT pairing?
- Which of the following can cause birth defects?
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