Microbiology Practice Test
A easy capture urine specimen become streaked to a SBA plate & Mac plate with 1 uL (0.001
mL) loop. The photos to the proper demonstrate the located increase. How might you document
the colony be counted & growth?
A: 10^four CFU/mL of a gram-high-quality bacillus
B: 10^3 CFU/mL of a gram-bad bacillus
C: 10^5 CFU/mL of a gram-superb bacillus
D: 10^5 CFU/mL of a gram-poor bacillus
**This is a stage 5 question** - ANS-B
**Was now not capable of discover pics for this**
A microbiologist turned into appearing Shigella serotyping on a possible Shigella isolate & the
organism did NOT serotype. The microbiologist was adamant that the organism was a Shigella
species because it changed into lactose poor on HE agar & non-motile in motility agar. What
must the microbiologist do to make sure that false-bad testing did now not arise?
A: Check serotyping antisera expiration date, if expired, use new serotyping antisera & repeat
checking out
B: Repeat check because the microbiologist forgot to add bacterial colonies
C: Heat specimen for 15 mins & repeat testing
D: Report Shigella species ruled out
**This is a stage five question** - ANS-C
A blanketed brush specimen changed into received into the micro lab from an ICU patient &
tradition the usage of a zero.001mL loop. The culture grew three colonies of Pseudomonas
aeruginosa. Which of the subsequent is the suitable way to document out the organism?
A: 3 CFU/mL of Pseudomonas aeruginosa
B: 300 CFU/mL of Pseudomonas aeruginosa
C: 3000 CFU/mL of Pseudomonas aeruginosa
D: Glucose nonfermenting gram-terrible rods
**This is a degree 5 query** - ANS-0.001ml = one thousand uL
1000uL * three colonies = 3000
, C
All of the following Mycobacterium species will motive tuberculosis, EXCEPT:
A: Mycobacterium bovis
B: Mycobacterium africanum
C: Mycobacterium leprae
D: Mycobacterium microti
**This is a stage four question** - ANS-C
Coccidia parasites are regularly obtained by way of fecal-oral routes via eating infected meals or
water. All of the subsequent are coccidia parasites EXCEPT?
A: Sarcocystis species
B: Cryptosporidium parvus
C: Trypanosoma cruzi
D: Isospora belli
**This is a stage nine query** - ANS-C
Illustrated inside the pinnacle photograph is a 6-day vintage colony with a gray-white cob-web
like mycelium growing on a mind-coronary heart infusion agar incubated at 30 levels C. Not the
rim of black pigmentation at the upper margin of the colony. An try failed to convert the colony to
a yeast shape by using the usage of 35 ranges C incubation. The H&E-stained tissue section of
the lung lesion from which the specimen become taken as might be determined by using a
pathologist, is illustrated inside the backside photograph. Considering those observations,
what's the ID of this isolate?
A: Histoplasma capsulatum
B: Sporothrix shenckii
C: Blastomyces dermatitidis
D: Coccidioides immitis
**This is a level 7 question** - ANS-D
In a UA, checks are executed that serve as a technique of screening for UTIs. Which of the
following exams detects the presence of inflammatory cells?
A: Niacin test
B: Nitrate discount test
C: Leukocyte esterase test
D: Catalase check