USMLE Actual final Pretest and Post test Exam Questions and Best Graded Guaranteed success latest 2024/2025
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Course
USMLE
Institution
USMLE
USMLE Actual final Pretest and Post test Exam Questions and Best Graded Guaranteed success latest 2024/2025
What type of normal flora is found on cutaneous surfaces? Urethra? Outer ear? - correct answer Staphylococcus epidermidis
What is bacteremia? - correct answer Bacteria in bloodstrea...
USMLE Actual final Pretest and Post test
Exam Questions and Best Graded Guaranteed
success latest 2024/2025
What type of normal flora is found on cutaneous surfaces?
Urethra? Outer ear? - correct answer Staphylococcus
epidermidis
What is bacteremia? - correct answer Bacteria in bloodstream
without overt clinical signs
What is septicemia? - correct answer Bacteria in bloodstream
(multiplying) with clinical symptoms
What is the important mechanism in which bacteria can attach to
catheters, shunts and prosthetic devices coated with Teflon?
Enamel of teeth? - correct answer Biofilm production
Changes surface tension of the liquid around them and thereby
"glue" themselves to the material
Which group of microorganisms posses a complex carbohydrate
cell wall? - correct answer Chitin, glucan or mannan
*Fungus*
Gram positive and negative stain colors? - correct answer G+:
Blue (Positively BLUE over you!)
,G-: Red (Negative RED commies!)
Endotoxin vs. Exotoxin - correct answer Endotoxins are not
protein excreted but part of cellular membrane that sheds off
What are the presentations of toxic shock syndrome? - correct
answer Fever
Rash
Desquamation (flaking)
Diarrhea
Hypotension (shock)
What is the toxic portion of LPS? - correct answer Lipid A
What are the 2 G+ rods that produce spores? - correct answer
Spores are spheres that protect a dormant bacterium form the
harsh environment
Bacillus
Clostridium
What are the 4 G+ rods? - correct answer Corynebacterium
Listeria
No spores formation
,What is the only group of G- cocci? - correct answer
Diplococcus
Neisseria
What gram stain is mycoplasma? - correct answer Neither
Mycoplasma do not have a cell wall
What are the 3 groups of G+ cocci bacteria? - correct answer
Streptococcus
Staphylococcus
Enterococcus
What is the only group of spiral bacteria? Which Gram stain does
it belong to? - correct answer Spirochetes
G-
What are microorganisms that do not gram stain well? - correct
answer kj: "These Rascals May Microscopically Lack Color"
T: Treponema (too thin; dark field microscopy + fluorescent
antibody stain)
R: Rickettsia (intracellular)
M: Mycobacteria (high-lipid-content cell wall; acid-fast)
What's the Ziehl-Neelsen stain? - correct answer Acid-fast
organisms
What does the Giemsa stain? - correct answer Borrelia
Plasmodium
trypanosomes
Chlamydia
What does the India ink stain? - correct answer Cryptococcus
neoformans
What does the PAS (periodic acid-Schiff) stain? - correct answer
PASs the sugar
Stains: glycogen, mucopolysaccharides
Whipple's disease diagnosis
What does the silver stain show? - correct answer Fungi
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