Preferred samples for plating onto Ashdown media include throat, rectal, or sputum samples. Disease presentation can range from subclinical to disseminated disease. This infection is en-demic in Southeast Asia. Which organism is being sought?
a. B. cepacia
b. Burkholderia gladioli
c. B. mallei
d. B. pseudomallei
D
Ashdown medium is used to isolate B. pseudomallei when melioidosis is suspected. Preferred specimens include throat, rectal, or sputum samples. The medium contains crystal violet and gentamicin as selective agents to suppress the growth of contaminating organisms. Neutral red is incorporated into the medium and is taken up by the organism, making the dry, wrinkled colony appear violet-purple, which distinguishes it from other bacteria.
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A sorus is ____
a. a fern spore b. the fern gametophyte c. an egg-producing structure d. where the sperm are produced e. a collection of sporangia
The somatosensory cortex _____
a. maps the distribution of somatic receptors on the body b. consists of gray matter c. involves only the spinal cord d. responds to all signals equally e. is not responsive to mechanoreceptors
The changes that occur in infected or injured tissue (redness, swelling, heat, pain) are due to the process of:
A. phagocytosis B. clone formation C. fever D. inflammation
Which lineage includes living members that are sharks, skates, and rays?
a. Sarcopterygii b. Actinopterygii c. Petromyzontoidea d. Chondrichthyes