BIOCHEMICALS
What test differentiates Strep species from Staph species?
What is catalase?
A medium that aids in the presumptive identification of organisms based on their appearance on the medium is called:
a. enriched
b. selective
c. differential
d. specialized
What is differential?
The lowest concentration of antibiotic that inhibits growth of a test organism is the:
a. minimum inhibitory concentration
b. serum inhibitory concentration
c. minimum bactericidal titer
d. maximum inhibitory titer
What is minimum inhibitory concentration?
Shigella species characteristically are:
a. urease positive
b. nonmotile
c. oxidase positive
d. lactose fermenters
What is nonmotile?
To be considered an Enterobacteriacea, what characteristics must the organism have?
Ferment glucose, reduce nitrate to nitrite, oxidase negative
Media used to support growth of Legionella pneumophila should contain which of the following additives?
a. X and V factors
b. hemin and vitamin K
c. charcoal and yeast extract
d. dextrose and laked blood
What is charcoal and yeast extract?
The Optochin disk is used for the identification of:
What is Streptococcus pneumoniae?
A beta-hemolytic streptococci that is bacitracin-resistant and CAMP-positive is?
What is Group B?
What knowledge can be learned from reading a TSI slant?
Gas producer, H2S producer, What sugar it ferments
Vibrio parahaemolyticus can be isolated best from feces on:
a. eosin methylene blue agar
b. hektoen enteric agar
c. salmonella shigella agar
d. thiosulfate citrate bile salts agar
What is thiosulfate citrate bile salts agar (TCBS)?
An antibiotic that inhibits cell wall synthesis is:
a. chloramphenicol
b. penicillin
c. sulfamethoxazole
d. colistin
What is penicillin?
An anaerobic, spore-forming, nonmotile, gram-positive bacillus isolated from a foot wound is most likely:
a. Actinomyces israelii
b. Clostridum perfringens
c. Bacillus subtilis
d. Eubacterium lentum
What is Clostridium perfringens?