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ENTERIC GNR-3AACTUAL TEST QUESTIONS WITH WELL ELABORATED ANSWERS (VERIFIED ANSWERS) LATEST UPDATED VERSION | ALREADY GRADED A+ What are the four groups of Gram Negative Rods? -$21.49
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ENTERIC GNR-3AACTUAL TEST QUESTIONS WITH WELL ELABORATED ANSWERS (VERIFIED ANSWERS) LATEST UPDATED VERSION | ALREADY GRADED A+ What are the four groups of Gram Negative Rods? -
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Course
ENTERIC GNR-3
Institution
ENTERIC GNR-3
ENTERIC GNR-3AACTUAL TEST QUESTIONS
WITH WELL ELABORATED ANSWERS
(VERIFIED ANSWERS) LATEST UPDATED
VERSION | ALREADY GRADED A+
What are the four groups of Gram Negative Rods? -
ENTERIC GNR-3AACTUAL TEST QUESTIONS
WITH WELL ELABORATED ANSWERS
(VERIFIED ANSWERS) LATEST UPDATED
VERSION ...
ENTERIC GNR-3A ACTUAL TEST QUESTIONS
WITH WELL ELABORATED ANSWERS
(VERIFIED ANSWERS) LATEST UPDATED
VERSION 2024-2025 | ALREADY GRADED A+
What are the four groups of Gram Negative Rods? - CORRECT ANSWER-1: Enteric GNR
2: Non-Fermentative GNR
3: Fastidious GNR
4: Misc. and Infrequently Encountered GNR
What percentages of the four groups of GNR are isolated in lab specimens? - CORRECT ANSWER-Enteric
GNR - 70-80%
Non-Fermentative GNR - 10-15%
Fastidious GNR - 10-15%
Misc. and Infrequently Encountered GNR - 1%
Which of the Family Enterobacteriaceae are Lactose Positive? - CORRECT ANSWER-Escherichia
Enterobacter
Citrobacter
Klebsiella
Serratia
What are the common characteristics of Enterobacteriaceae? - CORRECT ANSWER-1: Facultative
anaerobes
2: Non-fastidious
3: Most are normal human fecal flora
4: Ubiquitous in nature (except for intestinal pathogens)
What are the other names for Enterobacteriaceae? - CORRECT ANSWER-Enterics and Coliforms
,What does normal human fecal flora do? - CORRECT ANSWER-1: aid in breakdown of food
2: prevent pathogens from colonizing, stops opportunistic pathogens
What are Laboratory characteristics of Enterobacteriaceae? - CORRECT ANSWER-1: All reduce nitrate to
nitrites
2: Oxidase negative
3: All ferment glucose
4: Gram stain: GN pleomorphic rods
5: Colony morphology: SBA - Large gray mucoid, CHOC- Large gray mucoid, CNA - NG @ 48 hrs
6: Divided into lactose pos or lactose neg
What are the three categories of Enteric GNRs? - CORRECT ANSWER-1: Opportunistic pathogens (UTIs,
wounds, septicemia, Lower respiratory tract infections, meningitis)
2: Intestinal pathogens (Salmonella, Shigella, E. coli, Yersinia enterocolitica)
3: Non-intestinal pathogens (Yersinia pestis)
What two plates are used for GI sources? - CORRECT ANSWER-HEA and SMAC
What does TSI stand for? - CORRECT ANSWER-Triple Sugar Iron
What are the two parts of a TSI tube? - CORRECT ANSWER-Slant and Butt
Why are peptones in the TSI tube? - CORRECT ANSWER-They're added for a secondary food source for
when the carbohydrate source runs out
What are the ingredients in a TSI tube? - CORRECT ANSWER-Glucose 0.1%
Lactose 1.0%
Sucrose 1.0%
Peptones 2.0%
Phenol red
, Sodium thiosulfate and iron salts
What is the enzyme in Lactose? - CORRECT ANSWER-Beta galastosidase
What is the enzyme in Sucrose? - CORRECT ANSWER-Sucrase
What does H2S and Fe salts make? - CORRECT ANSWER-Ferrous sulfide (black color on TSI)
In a TSI, what do the colors mean for phenol red? - CORRECT ANSWER-Turns yellow when using carbs
(acidic)
Turns red when using peptones
Slant on TSI - CORRECT ANSWER-Aerobic and oxidation
Butt on TSI - CORRECT ANSWER-Anaerobic and fermentation
How would you record this TSI reaction:
Slant - Yellow
Butt - Yellow - CORRECT ANSWER-A/A
How would you record this TSI reaction:
Slant - Red
Butt - Yellow - CORRECT ANSWER-K/A
How would you record this TSI reaction:
Slant - Red
Butt - Red - CORRECT ANSWER-K/K
How would you record this TSI reaction:
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