Gram-Negative Rods: Classification and Characteristics
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Gram-Negative Rods: Classification and Characteristics

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Questions and Answers

What is the main basis for classifying medically important gram-negative rods?

Biochemical properties

Where are medically important gram-negative rods commonly found?

In soil, water, and vegetation

What is the relationship between medically important gram-negative rods and intestinal flora?

They are part of the normal intestinal flora of most animals and humans

How many genera are included in the largest collection of medically important gram-negative rods?

<p>More than 50 genera</p> Signup and view all the answers

Which of the following best describes the classification basis for medically important gram-negative rods?

<p>Biochemical properties, antigenic structure, and molecular analysis of genomes</p> Signup and view all the answers

Where are medically important gram-negative rods commonly found?

<p>In soil, water, and vegetation</p> Signup and view all the answers

What is the primary habitat of medically important gram-negative rods?

<p>Soil and water</p> Signup and view all the answers

How many genera are included in the largest collection of medically important gram-negative rods?

<p>More than 50 genera</p> Signup and view all the answers

Which characteristic is used to distinguish Enterobacteriaceae from other gram-negative rods?

<p>Oxidase production</p> Signup and view all the answers

What is a characteristic feature of Plesiomonas that distinguishes it from other members of the family Enterobacteriaceae?

<p>Oxidase positivity</p> Signup and view all the answers

What is a common characteristic of medically important gram-negative rods in terms of their nutritional requirements?

<p>Simple nutritional requirements</p> Signup and view all the answers

Which test is used to distinguish Enterobacteriaceae from many other gram-negative rods?

<p>Oxidase production</p> Signup and view all the answers

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