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ASCP Certification
bateria identification
11
Microbiology
03/16/2013

Additional Microbiology Flashcards

 


 

Cards

Term

A urine Gram stain shows gram positive cocci in clusters. The organism tested catalase positive. To speciate this organism from culture, the technician shouldperform a coagulase test ans a/an:

 

A. polymyxin B suceptibility

B. novobiacin suceptibility

C. oxidase

D. beta lactamase 

Definition

 

 

B. novobiocin suseptibility

Term

The gram stain from a blood culture shows gram positive cocci in chains. No growth occurs on blood agar plates incubated both aerobically and anaerobically. Additional testing should be done to detect the presence of:

 

A. Staphylococcus saprophyticus

B. Areococcus urinae

C. Abiotrophia defectiva

D. Streptococcus pneumoniae  

Definition

 

C. Abiotrophia defectiva

Term

Viridans streptpcocci can be differentiated from Streptococcus pneumoniae by:

 

 

A. alpha hemolysis

B. morphology

C. caralase reaction

D. bile solubility

 

Definition
D. bile solubility
Term

A reliable test for distinguishing Staphylococcus aureus from other staphylococci is:

 

A. oxidase

B. coagulase

C. catalase

D. optochin suceptibility

Definition
B. coagulase
Term

The optochin ( ethylhydrocupreine hydrocloride) disc is used for the identification of:

 

A. Haemophilus influenzae

B. group A beta hemolytic streptococci

C. Streptococcus pneumoniae

D. alpha hemolytic streptococci 

Definition
C. Streptococcus pneumoniae
Term

In the optochin suceptibility test, if there is a zone of inhibitionof 19-30mm surrounding the disc following overnight incubation at 37C, the colony most likely consists of:

 

A. staphylococci

B. streptococci

C. pneumococci

D. intestional bacilli

 

Definition
C. pneumococci
Term

Which two diseases are usually preceded by infection with beta hemolytic streptococci:

 

A. rheumatic fever, undulant fever

B. glomerulonephritis, rheumatic fever

C. rheumatic fever, tularemia

D. glomerulonephritis, undulant fever 

Definition
B. glomerulonephritis, rheumatic fever
Term

The enterotoxin produced by certain stains of hemolytic, coagulase positive Staphylococcus aureus:

 

 

A. is destroyed by boiling for 15-30 minutes

B. is identical to the demonecrotic toxin

C. causes one type of bacterial food poisoning

D. is highly antigenic

Definition
C. causes one type of bacterial food poisoning
Term

A gamma hemolytic Streptococcus that blackens bile esculin agar but does not grow in 6.5% NaCl broth is most likely:

 

A. group B Streptococcus

B. Enterococcus

C. group D Streptococcus

D. Streptococcus pneumoniae

 

Definition
C. group D Streptococcus
Term

Gram stain examination from a blood culture bottle shows dark blue, spherical organisms in clusters. Growth on sheep blood agar shows small, round, pale yellow colonies. Further tests should include:

 

A. catalase production and coagulase test

B. bacitracin suseptibility and serological typing

C. oxidase and deoxyribonuclease reactions

D. Voges-Proskauer and methyl red

Definition
A. catalase production and coagulase test
Term

"Nutritionally deficent" steptococci are:

 

A. enterococci

B. group D nonenterococci

C. cell wall deficient streptococci

D. in the genera Granulicatella and Abiotrophia 

Definition
D. in the genera Granulicatella and Abiotrophia