BOC Microbiology real exam Questions with
Revised Answers| Verified 100% Correct
Which of the following is the most appropriate specimen source and primary media
bettery?
a. endocervical- chocolate, Martin Lewis
b. sputum- sheep blood, Thayer-Martin, KV-laked blood
c. CSF- Columbia CNA, MacConkey
d. urine- sheep blood, chocolate, Columbia CNA - ✔✔a. endocervical- chocolate,
Martin Lewis
The ONPG test allows organisms to be classified as a lactose fermenter by testing for
which of the following?
a. permease
b. beta-galactosidase
c. beta-actamase
d. phosphatase - ✔✔b. beta-galactosidase
Sodium bicarbonate and sodium citrate are components of which of the follwoing?
a. JEMBEC system
b. MTM agar
c. MYC medium
d. ML agar - ✔✔a. JEMBEC system
Chocolate agar base containing vancomycin, colistin, anisomycin, and trimethoprim is
also known as:
,a. EMB agar
b. modified Thayer-Martin agar
c. Columbia CNA agar
d. Martin Lewis Agar - ✔✔d. Martin Lewis agar
- for Candida
When evaluating a new susceptibility testing system, if the new system characterizes a
susceptible isolate as resistant, this is termed a:
a. very major error
b. major error
c. minor error
d. acceptable error - ✔✔b. major error
-Very major error: resistant isolate is characterized as susceptible
-major error: susceptible isolate characterized as resistant
-minor error: susceptible or resistant isolate characterized as intermediate or
intermediate isolate as susceptible or resistant
Which of the following methods is inadequate for the detection of vancomycin-
intermediate S. aureus?
a. broth macrodilution
b. agar dilution
c. gradient ddiffusion
d. disk diffusion - ✔✔d. disk diffusion
-Just wont work for vancomycin susceptibility for S aureus
First-generation cephalosporins can be adequately represented by:
,a. cefotetan
b. ceftriaxone
c. cephalothin
d. cefoxitin - ✔✔c. cephalothin
Which one of the following organisms does not require susceptibility testing to the
antimicrobial indicated when isolated from a clinically significant source?
a. Staphylococcus aureus- clindamycin
b. Proteus mirabilis- gentamicin
c. Streptococcus pyogenes- penicillin
d. Escherichia coli- levofloxacin - ✔✔c. Streptococcus pyogenes- penicillin
-Resistance has not been documented
Which of the following antibiotics would routinely be tested and reported for isolates of
Pseudomonas aeruginosa?
a. penicillin
b. erythromycin
c. clindamycin
d. gentamicin - ✔✔d. gentamicin
Diagnosis of typhoid fever can be confirmed best by culture of:
a. stool
b. urine
c. blood
d. bone marrow - ✔✔d. bone marrow
, Vibrio parahaemolyticus can be isolated best from feces on:
a. eosin methylene blue (EMB) agar
b. Hektoen enteric (HE) agar
c. Salmonella Shigella (SS) agar
d. thiosulfate citrate bile salts (TCBS) agar - ✔✔d. thiosulfate citrate bile salts (TCBS)
agar
Which of the following media can be used to culture Campylobacter jejuni?
a. Skirrow medium
b. CIN agar
c. anaerobic CNA agar
d. bismuth sulfite - ✔✔a. Skirrow medium
-Bismuth sulfite selective for salmonella
Tests for beta-lactamase production in Haemophilus influenzae:
a. are not commercailly available
b. include tests that measure a change to an alkaline pH
c. should be performed on all blood and CSF isolates
d. are not valid for any other bacterial species - ✔✔c. should be performed on all
blood and CSF isolates
The best medium for culture of Francisella tularensis is:
a. Bordet-Gengou medium
b. cystine blood agar
c. Martin lewis agar
d. Ashdown agar - ✔✔b. cystine blood agar
Revised Answers| Verified 100% Correct
Which of the following is the most appropriate specimen source and primary media
bettery?
a. endocervical- chocolate, Martin Lewis
b. sputum- sheep blood, Thayer-Martin, KV-laked blood
c. CSF- Columbia CNA, MacConkey
d. urine- sheep blood, chocolate, Columbia CNA - ✔✔a. endocervical- chocolate,
Martin Lewis
The ONPG test allows organisms to be classified as a lactose fermenter by testing for
which of the following?
a. permease
b. beta-galactosidase
c. beta-actamase
d. phosphatase - ✔✔b. beta-galactosidase
Sodium bicarbonate and sodium citrate are components of which of the follwoing?
a. JEMBEC system
b. MTM agar
c. MYC medium
d. ML agar - ✔✔a. JEMBEC system
Chocolate agar base containing vancomycin, colistin, anisomycin, and trimethoprim is
also known as:
,a. EMB agar
b. modified Thayer-Martin agar
c. Columbia CNA agar
d. Martin Lewis Agar - ✔✔d. Martin Lewis agar
- for Candida
When evaluating a new susceptibility testing system, if the new system characterizes a
susceptible isolate as resistant, this is termed a:
a. very major error
b. major error
c. minor error
d. acceptable error - ✔✔b. major error
-Very major error: resistant isolate is characterized as susceptible
-major error: susceptible isolate characterized as resistant
-minor error: susceptible or resistant isolate characterized as intermediate or
intermediate isolate as susceptible or resistant
Which of the following methods is inadequate for the detection of vancomycin-
intermediate S. aureus?
a. broth macrodilution
b. agar dilution
c. gradient ddiffusion
d. disk diffusion - ✔✔d. disk diffusion
-Just wont work for vancomycin susceptibility for S aureus
First-generation cephalosporins can be adequately represented by:
,a. cefotetan
b. ceftriaxone
c. cephalothin
d. cefoxitin - ✔✔c. cephalothin
Which one of the following organisms does not require susceptibility testing to the
antimicrobial indicated when isolated from a clinically significant source?
a. Staphylococcus aureus- clindamycin
b. Proteus mirabilis- gentamicin
c. Streptococcus pyogenes- penicillin
d. Escherichia coli- levofloxacin - ✔✔c. Streptococcus pyogenes- penicillin
-Resistance has not been documented
Which of the following antibiotics would routinely be tested and reported for isolates of
Pseudomonas aeruginosa?
a. penicillin
b. erythromycin
c. clindamycin
d. gentamicin - ✔✔d. gentamicin
Diagnosis of typhoid fever can be confirmed best by culture of:
a. stool
b. urine
c. blood
d. bone marrow - ✔✔d. bone marrow
, Vibrio parahaemolyticus can be isolated best from feces on:
a. eosin methylene blue (EMB) agar
b. Hektoen enteric (HE) agar
c. Salmonella Shigella (SS) agar
d. thiosulfate citrate bile salts (TCBS) agar - ✔✔d. thiosulfate citrate bile salts (TCBS)
agar
Which of the following media can be used to culture Campylobacter jejuni?
a. Skirrow medium
b. CIN agar
c. anaerobic CNA agar
d. bismuth sulfite - ✔✔a. Skirrow medium
-Bismuth sulfite selective for salmonella
Tests for beta-lactamase production in Haemophilus influenzae:
a. are not commercailly available
b. include tests that measure a change to an alkaline pH
c. should be performed on all blood and CSF isolates
d. are not valid for any other bacterial species - ✔✔c. should be performed on all
blood and CSF isolates
The best medium for culture of Francisella tularensis is:
a. Bordet-Gengou medium
b. cystine blood agar
c. Martin lewis agar
d. Ashdown agar - ✔✔b. cystine blood agar
