Which Statement Regarding the Gram Stain Is FALSE

question 44

Multiple Choice

Which statement regarding the Gram stain is FALSE?

• A) A Gram stain may give sufficient information to start appropriate antibiotic treatment-for example a Gram-positive diplococcus in sputum is likely to be Streptococcus pneumoniae.
• B) A Gram stain can sometimes be used to make a diagnosis-for example a Gram-negative diplococcus in WBC from urethral discharge is Neisseria gonorrhoeae.
• C) Gram staining can be used to differentiate intestinal normal microbiota from pathogens-for example differentiating E. coli from Salmonella enterica.
• D) In most cases, Gram staining is not sufficient to identify an organism-for example, Gram-positive staphylococci on skin may be either S. aureus or S. epidermidis.
• E) Medically important bacteria can seldom be identified by Gram staining alone-for example the throat may harbor Streptococcus pyogenes (pathogen) as well as Streptococcus species that are normal microbiota.

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Definitions:

Cross Elasticity of Demand

A measurement of how the quantity demanded of one good responds to a change in the price of another good.

Desktop Computer Sales

The volume or monetary value of desktop computers sold in a specific time frame, reflecting consumer demand and technological trends.

Computer Company

A business entity that designs, manufactures, markets, or sells computer hardware, software, or related services.

Price Elasticity of Supply

A measure of how much the quantity supplied of a good responds to a change in the price of that good, represented as a ratio of percentage change in quantity supplied to the percentage change in price.