Bacte Flashcards
Which of the following specimens
would be acceptable for anaerobic
culture?
A. Vaginal and eye discharge
B. Ear and nose discharge
C. Pleural and brain discharge
D. Urine and sputum
C. Pleural and brain discharge
Which of the following should best
differentiate Streptococcus agalactiae
from Streptococcus pyogenes?
A. The ability to grow on sodium azide
medium
B. A positive bile esculin test
C. Hydrolysis on sodium hippurate
D. Beta hemolysis on sheep blood agar
C. Hydrolysis on sodium hippurate
Components of gram stain?
Crystal violet,
grams iodine,
acetone
alcohol,
safranin
SPS is used as an anticoagulant for
blood culture because it.
Inactivates neutrophils and
components of serum complement
Thioglycolate broth is stored at room
temperature and in dark so that
d.There is a decreased absorption of
oxygen in the medium
Mac Conkey is considered what type
of media?
Selective and Differential
Which of the following organisms
must be incubated in a microaerophilic
environment for optimal recovery of the
organisms?
C. jejuni
When performing a Kovac’s indole
test, the substrate must contain?
Tryptophan
Thioglycolate broth is stored at room
temperature and in dark so that
There is a decreased absorption of
oxygen in the medium
When processing throat swab for a
streptococcus culture, the medium of
choice is ?
Sheep blood agar plate
Shigella species characteristically
are?
non-motile
An antibiotic that inhibit cell wall?
Penicillin
A gram positive coccus isolated
from blood culture has the following
characteristics. Optochin (-); Hippurate
hydrolysis (+); Bacitracin (-) ; Catalase
(-) Bile esculin hydrolysis (-) This
organism is most likely:
S. agalactiae
H. parainfluenza requires growth
factor for growth. This are?
X and V
Presumptive test for Streptococcus
pneumoniae?
Optochin
