A clinical microbiologist makes serial dilutions of several antimicrobials in broth, and then incubates each drug dilution series with a standard amount of a patient's isolated pathogen. What is this microbiologist setting up?
A. A Kirby-Bauer technique
B. A antibiogram
C. An E-test
D. A therapeutic index (TI)
E. A minimum inhibitory concentration (MIC) test
Answer: E
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Celiac disease is an autoimmune disorder which destroys the microvilli of the small intestine. Vitamin B12 can be absorbed by passive diffusion across the microvilli of the small intestine. Consider a patient who has had 10% of their microvilli destroyed. If the concentration of vitamin B is 0.6 pg/ml inside the lumen of the small intestine and 0.3 pg/ml on the inside of an epithelial cell, how is the diffusion rate of vitamin B altered in this patient?
A. It is reduced by 10%. B. It is reduced by .003%. C. It is increased by 10%. D. It is reduced by .3%. E. It is increased by .3%.
Vertebrates have a closed circulatory system with a dorsal heart and blood containing hemoglobin
____________________ Indicate whether the statement is true or false.
Antigen receptors give __________ the collective potential to recognize billions of different antigens.
Fill in the blank(s) with the appropriate word(s).
Typical signs of dehydration include.
A) rapid, strong pulse. B) low hematocrit. C) increased urine output. D) dry mucous membranes.