K. denitrificans, which is nonhemolytic and tends to pit the agar, also grows on selective media ...

Dime

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7 years ago

K. denitrificans, which is nonhemolytic and tends to pit the agar, also grows on selective media ...

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

Delicate ring forms and crescent-shaped gametocytes are the only forms normally observed in the peripheral blood of which Plasmodium spp.?

a. P. vivax
b. P. malariae
c. P. falciparum
d. P. ovale

The normal flora of the adult large bowel consists predominantly of:

a. anaerobic species.
b. Staphylococcus.
c. Enterococcus.
d. Enterobacteriaceae.

A fungus is recovered from a nail scrapping. Microscopic examination reveals numerous smooth, thin-walled, club-shaped, multiseptate macroconidia; however, microconidia are absent. The or-ganism can be identified as:

a. Microsporum canis.
b. E. floccosum.
c. T. rubrum.
d. M. gypseum.

Which of the following nonpathogenic protozoa has a very large glycogen vacuole in its cyst form and measures approximately 5 to 20 m in diameter?

a. E. coli
b. I. butschlii
c. E. dispar
d. E. nana

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Arab12006

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7 years ago

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.

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C
P. falciparum infects young and old red blood cells (RBCs). Development after the ring stage takes place in blood vessels of internal organs. Delicate ring forms and crescent-shaped gameto-cytes are the only forms normally observed in peripheral blood. Gametocytes appear after 7 to 10 days.

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A
The normal flora of the adult large bowel (colon) is established relatively early in life and consists predominantly of anaerobic species, including Bacteroides, Clostridium, Peptostreptococcus, Bifidobacterium, and Eubacterium. Aerobes, including Escherichia coli, other Enterobacteriaceae, enterococci, and streptococci, are outnumbered by anaerobes 1000:1.

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B

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B
I. butschlii has a characteristically large glycogen vacuole in its cyst form. Although worldwide in distribution, it is a nonpathogenic amoeba.

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Dime Author

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7 years ago

I know this sounds cliche, but I was thinking the same thing for each of these. Thanks for confirming Slight Smile

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