Q. Which of the following disease is best diagnosed by serologic means? Q Fever Actinomycosis Pulmonary tuberculosis Gonorrhea Answer: Q Fever
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Q. Each of the following agents is a recognized cause of diarrhea except Enterococcus faecalis Escherichia coli Clostridium perfringens Vibrio cholerae Answer: Enterococcus faecalis
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Q. A 30 year old woman has non-bloody diarrhea for the past 14 hours. Which one of the to following organisms is least likely to cause this illness? Salmonella enteritidis Clostridium difficile Streptococcus pyogens none of the above Answer: Streptococcus pyogens
Q. Each of the following organisms is an important cause of urinary tract infections except: Bacteriodes fragilis Klebsiella pneumoniae Proteus mirabilis None Of These Answer: Bacteriodes fragilis
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Q. Each of the following statements concerning the Gram stain is correct except: Mycobacterium tuberculosis stains blue because it has a thick lipid layer Escherichia coli stains pink because it has a thin peptidoglycan layer Streptococcus pyogens stains blue because it has a thick peptidoglycan layer Mycoplasma pneumoniae is not visible in the Gram’s stain
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Q. The identification of bacteria by serologic tests is based on the presence of specific antigens. Which of the following bacterial components is least likely to contain useful antigens? Ribosomes Cell wall Capsule Flagella Answer: Ribosomes
Q. The cogulase test is used to differentiate Staphylococcus aureus from Staphylococcus epidermidis Streptococcus pyogens from Enterococcus faecalis Staphylococcus epidermidis from Neisseria meningitidis Streptococcus pyogens from Staphylococcus aureus Answer: Staphylococcus aureus from Staphylococcus epidermidis
Q. Which of the following bacteria has the lowest 50% infective dose (ID50)? Shigella sonnei Campylobacter jejuni Salmonella typhi Vibrio cholerae Answer: Shigella sonnei
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Q. Biosphere is: that part of the earth in which non-living organisms exist that park of the earth in which living organisms exist or which support life that part of the earth in which both living and non-living organisms exist none of these Answer: that park of the earth in which living organisms exist or
