Addtl Readings Flashcards
All of the following are beta hemolytic on BAP except?
A. S. agalactiae
B. S. pyogenes
C. S. pneumoniae
D. None of these
C. S. pneumoniae
Pigment production is an inherent characteristic of a specific
organism, choose the incorrect pair between species and pigment
A. C. violaceum - violet
B. S. rubideae - brick red
C. Kluyvera spp. - blue
D. None of these
D. None of these
Bacterial species that develops colonies with an old sock odor on
Mannitol Salt agar would most likely be
S. aureus
Surface scum at the sides of thioglycolate may be produced by which
of the following species?
Pseudomonas
Small “fuzzy edge” umbonate center colony on chocolate agar may
be produced by which of the following species?
Eikenella
Colonies on visual examination on SBA are described as “medusa
heads”, this may be indicative of which of the following species?
B. anthracis
Which of the following media can be used for primary plating and
subculturing of fastidious organism like haemophilus and neisseria?
CAP
Antibiotics in Modified Thayer Martin
1. Vancomycin 2. Nystatin 3. Trimetophrim 4. Amphotericin B
1 and 3
For primary plating of fungi, which of the following media can be
used?
SBA
Alpha hemolysis results in
A. A partial lysis on of RBCs in SBA
B. Green discoloration of the medium
C. Both a and b
D. None of these
C. Both a and b
A moderate growth of heaped, dry appearing white colony is isolated
from a patient with thrush. The colony has tiny projections extending out
along the edge outfits margin.
Candida albicans
“Bull’s eye” appearing colonies on SBA may likely be
A. S pneumoniae
B. S pyogenes
C. S agalactiae
D. none of these
C. S agalactiae
The fermentable carbohydrate in MacConkey agar
A. Sucrose
B. Lactose
C. Salicin
D. Glucose
B. Lactose
which is not a component of Hektoen Agar?
A. Sucrose
B. Lactose
C. Salicin
D. Glucose
D. Glucose
TSI and KIA are biochemical test media used to detect fermentation.
What carbohydrate is absent in KIA?
A. Glucose
B. Sucrose
C. Lactose
D. None of these
B. Sucrose
pH indicator incorporated in TSI is
A. Neutral red
B. Bromthymol blue
C. Phenol red
D. None of these
C. Phenol red
A negative decarboxylase test using moeller’s broth is indicated by ___ color
A. Purple
B. burgundy/red
C. Yellow
D. Green
E. None of these
C. Yellow
Which of the following biochemical tests can be helpful in the initial
differentiation of proteus, providencia, and morganella from other
enterobacteriaceae?
A. Citrate utilization test B. Decarboxylase test
C. Dnase test
D. Deaminase test
D. Deaminase test
Indicator for citrate
bromothymol blue
Following the addition of 10% ferric chloride, a green discoloration is
noted in phenylalanine agar. This must be reported as:
Positive
Which of the following is not classified as an automated system for
microbial identification?
API
Test that aids in identification of anaerobes:
Spot Indole
Presumptively identify gram + cocci that are catalase
LAP test
Identify group A streptococci and likewise differentiate enterococcus
and group D streptococci
PYR
Presumptive identification of S. pneumoniae from sputum, blood and
CSF
Bile solubility
In Christensen’s, Urea Agar may contain which of the following pH
indicators? Use choices in #66
A. Neutral Red
B. Bromthymol Blue
C. Phenol Red
D. None of these
C. Phenol Red
KOVAC/s reagent is added to media following incubation to detect
Production of indole
Development of red color is reported as a positive result in all of the
following tests except:
A. PYR
B. LAP test
C. ONPG
D. None of these
C. ONPG
Addition of ninhydrin reagent
Rapid Hippurate Hydrolysis
Positive result of malonate and citrate test
increased alkaline pH
