K. denitrificans, which is nonhemolytic and tends to pit the agar, also grows on selective media that support the growth of which gram-negative diplococci?
a. Capnocytophaga spp.
b. C. hominis
c. A. aphrophilus
d. N. gonorrhoeae
D
Kingella spp. are catalase-negative, which helps separate them from Neisseria spp. (see Chapter 40), with which they are sometimes confused. K. denitrificans may be mistaken for N. gonorr-hoeae when isolated from modified Thayer-Martin agar. Nitrate reduction is a key test in diffe-rentiating K. denitrificans from N. gonorrhoeae, which is nitrate-negative.
You might also like to view...
Which of the following is a characteristic of monocots?
a. veins running parallel to the length of leaves b. a circular root system with a tap root c. pollen with three furrows d. flower parts arranged in multiples of four
A ____ causes the blood vessels of the skin to relax and increase in diameter
a. decrease in body temperature b. increase in body temperature c. electrical stimulus d. mechanical stimulus e. chemical stimulus
The product of the p53 gene _____
A) inhibits the cell cycle B) slows down the rate of DNA replication by interfering with the binding of DNA polymerase C) causes cells to reduce expression of genes involved in DNA repair D) allows cells to pass on mutations due to DNA damage
The clumped distribution of coral colonies is due to ____.
A. asexual reproduction B. patchy distribution of resources C. availability of sunlight D. competition for limited resources E. uniformly available resources