An inoculating loop must be flamed to uniform orange-hot from base to tip A. after culture is transferred to the wire loop but before transfer to new media B. before culture is transferred to the wire loop and after culture is transferred from the wire loop to new media C. after culture is transferred to the wire loop and before culture is transferred from the wire loop to new media D. before culture is transferred to the wire loop

An inoculating loop must be flamed to uniform orange-hot from base to tip A. after culture is transferred to the wire loop but before transfer to new media B. before culture is transferred to the wire loop and after culture is transferred from the wire loop to new media C. after culture is transferred to the wire loop and before culture is transferred from the wire loop to new media D. before culture is transferred to the wire loop

Basic Clinical Laboratory Techniques 6E

6th Edition

ISBN:9781133893943

Author:ESTRIDGE

Publisher:ESTRIDGE

Chapter6: Basic Clinical Chemistry

Section6.8: Fecal Occult Blood Test

Problem 1CS

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Which of the following is the proper technique for inoculating an agar slant with a broth culture? A. Stab the butt of the media with the wire loop. B. Stab the surface of the agar media with the wire loop beginning at the base of the tube moving toward the mouth as you withdraw the loop. C. Gently move the wire loop back and forth across the surface of the agar beginning at the mouth of the tube moving down toward the base of the slant. D. Gently move the wire loop back and forth across the surface of the agar beginning at the base of the slant as you withdraw it from the tube.
An inoculating loop or needle is sterilized using heata. by one brief passage.b. for exactly 5 minutes.c. until the entire wire is bright red.d. until the handle is bright red.e. until the tip is bright red.
In spread plate method, inoculating loop is used to spread bacteria from the inoculation site. For quadrant streaking, the loop must be flame sterilized between quadrant streaks. a. First statement is TRUE, Second statement is FALSE. b. First statement is FALSE, Second statement is TRUE. c. Both statements are TRUE. d. Both statements are FALSE.
Blood agar is often used to observe changes in the appear-ance of the agar around the colonies growing on this medium.This medium could then be called:(a) Selective(b) Designated(c) Differential(d) Defined(e) Exact
In this experiment, a culture was serially diluted to the concentrations below. Each plate was plated with 0.25mL of the dilution. Using the most diluted plate, what is the correct concentration of the original culture? A) 2.0 X 10^-3 cells/mL B) 2.0 X 10^5 cells/mL C) 4.0 X 10^5 cells/mL D) 5.0 X 10^4 cells/mL
What type of medium is best used to maintain a preserve specimen before clinical analysis? A. Enriched b. Selective c. Differential d. Reducing e. Nutrient
The thermal death point is best described as:(a) The highest temperature that will support growth of amicrobial culture(b) The length of time required for killing 100% of mi-crobes in a 24-hour culture that is heated to 100°C(c) The temperature at which a previously growing 24-hourculture will begin to die(d) The temperature at which 100% of the microbes in a24-hour culture will be killed in 10 minutes
To retrieve a sample from a culture tube with an inoculating loop, the cap of the tube is a. removed and held in one’s teeth. b. removed and held with the fingers of the loop hand. c. removed with the fingers of the loop hand and placed in the fingers of the tube hand. d. removed with the fingers of the loop hand and placed on the laboratory bench. e. Any of these methods can be used.
You have aseptically inoculated an unknown organism on a blood agar plate. You return 48 hours later and the agar is no longer red and opaque but now is yellow and transparent where the bacteria has grown. You conclude your organism exhibits... A. Alpha hemolysis B. Gamma hemolysis C. Beta hemolysis D. No lysis
during inoculation, the bacterial culture tube is always held at an angle and the lid of the Petri dish is slightly open. Explain the purpose of these steps briefly.
1. Explain why the following steps are essential during sub-culturing: a. Flaming the inoculating instrument prior to and after each inoculation b. Holding the test tube caps in the hand as illustrated in Figure 1. c. Cooling the inoculating instrument prior to obtaining the inoculum d. Flaming the neck of the tubes immediately after uncapping and before recapping 2. Describe the purposes of the sub-culture procedure. 3. Explain why a straight inoculating needle is used to inoculate an agar deep tube. 4. What is the indication of bacterial growth in each of the media? (nutrient broth, nutrient agar slant, nutrient agar deep? 5. Enumerate the Good Microbiological Practices encountered in the activity. 6. Upon observation of the nutrient agar slant culture, you strongly suspect that the culture is contaminated. Outline the method you would follow to ascertain whether your suspicion is justified.
a pure bacterial culture was diluted by adding a 0.2 mL aliquot to 0.9mL water. Then 0.1 mL of this dilution was plated out, yielding 82 colonies. Calculate the CFU/mL in the original culture.

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	A.	after culture is transferred to the wire loop but before transfer to new media
	B.	before culture is transferred to the wire loop and after culture is transferred from the wire loop to new media
	C.	after culture is transferred to the wire loop and before culture is transferred from the wire loop to new media
	D.	before culture is transferred to the wire loop