When reporting a direct smear from a primary specimen, it is important to note the presence and quantity of white blood cells even in the absence of bacteria for all of the following reasons ex-cept:
a. the pathogen may not be present in suffi-cient quantities.
b. the presence of white blood cells indicates a purulent process.
c. the pathogen may not be present in the sample collected.
d. it is not important to report white blood cells unless bacteria are present.
D
White blood cells are indicative of an infective process with or without the presence of visible bacteria in a direct smear and should be reported. Failure to see organisms in the direct smear may result from the sample containing low numbers of pathogens, probability and simply no or-ganisms present in the sample placed on the smear, or the organisms are difficult to visualize due to size and Gram staining characteristics.
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This bacterium derives nutrition by digesting human intestinal contents. Thus, this bacterium is an _____
A) aerobic chemoheterotroph B) aerobic chemoautotroph C) anaerobic chemoheterotroph D) anaerobic chemoautotroph
The way DNA stores information is through the ________ of bases
A) sequence B) size C) different types D) number