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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   Add to cart

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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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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 ...

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  • October 17, 2024
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  • 2024/2025
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  • Questions & answers
  • ENTERIC GNR-3
  • ENTERIC GNR-3
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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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