TEXTBOOK OF DIAGNOSTIC MICROBIOLOGY (MAHON)
TEST EXAM QUESTIONS AND CORRECT ANSWERS 2026
Obligate anaerobe -correct answersA bacterium that grows only on plates incubated in the
absence of oxygen would be categorized as a(n):
Adherence to surfaces -correct answersFimbriae present on the outer surface of bacteria are
used for:
It follows glycolysis and produces reduced nico namide adenine dinucleo de (NADH) -correct
answersAll of the following are characteris c of fermenta on except:
Candida albicans -correct answersOf the following, which would most likely cause an
opportunis c infec on in the genitourinary tract of a woman of childbearing age?
The systema c collec on and analysis of data -correct answersSurveillance is defined as:
Staphylococcus aureus, Pseudomonas aeruginosa, MRSA, Escherichia coli -correct
answersMicrobes commonly encountered in health care-associated infec ons in hospitals
include:
Assist in an outbreak inves ga on -correct answersPulsed-field gel electrophoresis (PFGE) might
be performed to:
The percentage of infec ons in surgical sites or procedures -correct answersThe occurrence of
surgical site infec ons is generally calculated as:
,Bacillus anthracis, Yersinia pes s, Francisella tularensis -correct answersMicrobial pathogens of
poten al bioterrorism ac vity include:
Spectrum of ac vity, rate of ac on, mechanism of ac on -correct answersWhich of the
following characteris cs should be considered when selec ng an an microbial agent?
HEPA filters -correct answersWhat type of filter does a class II BSC use to filter out infec ous
agents?
Rejec ng subop mal specimens -correct answersWhich one of the following involves specimen
management in the preanaly c process?
SPS -correct answersWhich of the following an coagulants is appropriate for use in
microbiology?
Urogenital swab -correct answersWhich of the following specimens should not be refrigerated?
Cerebrospinal fluid -correct answersWhich of the following specimens requires immediate
processing when received in the microbiology laboratory?
-The specimen is preserved in formalin.
-Informa on on the requisi on does not match informa on on the specimen label.
-A second stool sample is submi ed from the same pa ent on the same day -correct
answersWhich of the following are reasons to reject a specimen for culture?
Tapeworm proglo ds -correct answersWhich one of the following is noted from a macroscopic
observa on?
, Throat swab -correct answersIn which of the following specimens is a direct microscopic
examina on not useful?
Differen al media -correct answersChocolate agar is an example of which of the following?
MacConkey agar -correct answersWhich of the following is an example of a selec ve and
differen al medium?
Urine -correct answersWhich of the following specimens is cultured using a quan ta ve
isola on technique?
Acid-fast -correct answersWhich of the following stains is best used to detect mycobacterial
organisms in clinical samples?
Chi n -correct answersCalcofluor white is a colorless dye that binds with which of the following
structures?
Nonviscous fluids -correct answersCytocentrifuga on is an excellent method for which of the
following types of samples?
Blue -correct answersIn a Wright-Giemsa-stained smear, bacteria would appear as which of the
following colors?
Candida albicans -correct answersA moderate growth of a heaped, dry-appearing, white colony
is isolated from a pa ent with thrush. The colony has ny projec ons extending out along the
edge of its margin. A presump ve iden fica on of this organism would be:
TEST EXAM QUESTIONS AND CORRECT ANSWERS 2026
Obligate anaerobe -correct answersA bacterium that grows only on plates incubated in the
absence of oxygen would be categorized as a(n):
Adherence to surfaces -correct answersFimbriae present on the outer surface of bacteria are
used for:
It follows glycolysis and produces reduced nico namide adenine dinucleo de (NADH) -correct
answersAll of the following are characteris c of fermenta on except:
Candida albicans -correct answersOf the following, which would most likely cause an
opportunis c infec on in the genitourinary tract of a woman of childbearing age?
The systema c collec on and analysis of data -correct answersSurveillance is defined as:
Staphylococcus aureus, Pseudomonas aeruginosa, MRSA, Escherichia coli -correct
answersMicrobes commonly encountered in health care-associated infec ons in hospitals
include:
Assist in an outbreak inves ga on -correct answersPulsed-field gel electrophoresis (PFGE) might
be performed to:
The percentage of infec ons in surgical sites or procedures -correct answersThe occurrence of
surgical site infec ons is generally calculated as:
,Bacillus anthracis, Yersinia pes s, Francisella tularensis -correct answersMicrobial pathogens of
poten al bioterrorism ac vity include:
Spectrum of ac vity, rate of ac on, mechanism of ac on -correct answersWhich of the
following characteris cs should be considered when selec ng an an microbial agent?
HEPA filters -correct answersWhat type of filter does a class II BSC use to filter out infec ous
agents?
Rejec ng subop mal specimens -correct answersWhich one of the following involves specimen
management in the preanaly c process?
SPS -correct answersWhich of the following an coagulants is appropriate for use in
microbiology?
Urogenital swab -correct answersWhich of the following specimens should not be refrigerated?
Cerebrospinal fluid -correct answersWhich of the following specimens requires immediate
processing when received in the microbiology laboratory?
-The specimen is preserved in formalin.
-Informa on on the requisi on does not match informa on on the specimen label.
-A second stool sample is submi ed from the same pa ent on the same day -correct
answersWhich of the following are reasons to reject a specimen for culture?
Tapeworm proglo ds -correct answersWhich one of the following is noted from a macroscopic
observa on?
, Throat swab -correct answersIn which of the following specimens is a direct microscopic
examina on not useful?
Differen al media -correct answersChocolate agar is an example of which of the following?
MacConkey agar -correct answersWhich of the following is an example of a selec ve and
differen al medium?
Urine -correct answersWhich of the following specimens is cultured using a quan ta ve
isola on technique?
Acid-fast -correct answersWhich of the following stains is best used to detect mycobacterial
organisms in clinical samples?
Chi n -correct answersCalcofluor white is a colorless dye that binds with which of the following
structures?
Nonviscous fluids -correct answersCytocentrifuga on is an excellent method for which of the
following types of samples?
Blue -correct answersIn a Wright-Giemsa-stained smear, bacteria would appear as which of the
following colors?
Candida albicans -correct answersA moderate growth of a heaped, dry-appearing, white colony
is isolated from a pa ent with thrush. The colony has ny projec ons extending out along the
edge of its margin. A presump ve iden fica on of this organism would be:
