Gram-Negative Bacteria and their Clinical Importance

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Which characteristic of Enterobacteriaceae is NOT mentioned in the text?

They have variable motility

They are cytochrome oxidase positive (correct)

They are bacilli and non-sporulated

They can reduce nitrate to nitrite

What is the main reason why non-fermenter gram-negative bacilli (BNF) are a relevant group?

They are incapable of reducing nitrate to nitrite

They cause severe, fatal infections, especially in the hospital environment (correct)

They have a higher frequency of isolation compared to Enterobacteriaceae

They are aerobic and can ferment sugars

Why are Gram-negative bacteria (GNB) considered a significant public health problem?

Because they primarily infect only healthy individuals

Due to their susceptibility to antibiotics

Because they are easy to manage and treat

As a result of their high resistance to antibiotics (correct)

What percentage of gram-negative isolates do Enterobacteriaceae account for according to the text?

80% Signup and view all the answers

Which of the following is NOT a clinically pertinent gram-negative organism mentioned in the text?

Clostridium difficile Signup and view all the answers

Why are patients infected with Gram-negative bacteria often placed in the intensive care unit (ICU)?

Due to the high morbidity and mortality risk associated with GNB infections Signup and view all the answers

Which two large groups are responsible for most clinical isolates of Gram-negative bacteria?

Enterobacteriaceae and non-fermenters Signup and view all the answers

How do Gram-negative bacteria differ from Gram-positive bacteria in terms of antibiotic resistance?

Gram-positive bacteria are more susceptible to antibiotic resistance Signup and view all the answers

Which of the following diseases can be caused by Enterobacteriaceae?

Urinary tract infections Signup and view all the answers

What is a distinguishing feature of non-fermenters mentioned in the text?

They are capable of fermenting sugars Signup and view all the answers

Which of the following is a characteristic of Enterobacteriaceae mentioned in the text?

Cytochrome oxidase positive Signup and view all the answers

What is a notable aspect of the antimicrobial sensitivity profile of non-fermenters?

Intrinsic resistance due to specific gene mechanisms Signup and view all the answers

Which microorganism is NOT considered a non-fermenter according to the text?

Klebsiella Signup and view all the answers

Why are Gram-negative bacteria considered a significant public health problem?

Due to their high resistance to antibiotics Signup and view all the answers

Which group of gram-negative bacteria is responsible for most clinical isolates according to the text?

Pseudomonas aeruginosa Signup and view all the answers

What is one of the clinically pertinent gram-negative organisms mentioned in the text?

Escherichia coli Signup and view all the answers

What is the main difference between Enterobacteriaceae and non-fermenters as mentioned in the text?

Their ability to ferment sugars Signup and view all the answers

Why do patients infected with Gram-negative bacteria often require intensive care unit (ICU) admission according to the text?

Due to the need for constant monitoring and high risk of morbidity and mortality Signup and view all the answers

Gram-Negative Bacteria and their Clinical Importance

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