CFTR Mutation Pathophysiology

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main consequence of defective CFTR in cystic fibrosis?

  • Increased secretion of chloride
  • Decreased reabsorption of sodium
  • Decreased secretion of chloride (correct)
  • Increased reabsorption of water

Which system is the most affected in cystic fibrosis?

  • Nervous system
  • Respiratory system (correct)
  • Cardiovascular system
  • Skeletal system

What is the major cause of morbidity and mortality in cystic fibrosis?

  • Liver diseases
  • CF-related diabetes
  • Respiratory infections (correct)
  • Intestinal obstruction

What happens to the viscosity of secretions in cystic fibrosis?

<p>Viscosity increases (A)</p> Signup and view all the answers

What is the most common pathogen causing disease in CF patients?

<p>Staphylococcus aureus (B)</p> Signup and view all the answers

How does defective CFTR affect airway surface liquid?

<p>Decreases its hydration (C)</p> Signup and view all the answers

What are the major long-term complications of cystic fibrosis?

<p>Progressive lung disease &amp; CF-related diabetes (C)</p> Signup and view all the answers

What happens to sputum in cystic fibrosis that facilitates pathogen colonization?

<p>It contains an abundance of nutrients (B)</p> Signup and view all the answers

What is the most common Burkholderia cepacia complex species found in people with cystic fibrosis?

<p>B. multivorans (A)</p> Signup and view all the answers

Which Burkholderia cepacia complex species produces a melanin-like pigment that helps evade oxidative killing in the host?

<p>B. cepacia (A)</p> Signup and view all the answers

What is the unique characteristic of Stenotrophomonas maltophilia among the mentioned bacteria?

<p>Flagellated motile (C)</p> Signup and view all the answers

What makes Burkholderia cepacia complex resistant to antibiotics according to the text?

<p>Production of metalloproteinases (D)</p> Signup and view all the answers

Which bacterium is described as an environmental bacteria that lives in water, aquatic areas, and wet surfaces?

<p>S. maltophilia (C)</p> Signup and view all the answers

Which Burkholderia cepacia complex species contributes more to Cepacia syndrome due to its inflammatory nature?

<p>B. cepacia (B)</p> Signup and view all the answers

What characteristic of B. cepacia contributes to its survival in the lungs?

<p>Production of melanin-like pigment (A)</p> Signup and view all the answers

Which pathogen is a common clinical pathogen causing a wide range of infections in skin, soft tissue, and deep tissues?

<p>Staphylococcus aureus (B)</p> Signup and view all the answers

What is the leading cause of bloodstream and lower respiratory tract infections according to the text?

<p>MRSA (B)</p> Signup and view all the answers

Which pathogen is a dominant pathogen in people with cystic fibrosis contributing to morbidity and mortality?

<p>Pseudomonas aeruginosa (D)</p> Signup and view all the answers

What is attributed to the adaptability and flexibility of Pseudomonas aeruginosa in causing chronic infections?

<p>Extensive number of virulence factors (C)</p> Signup and view all the answers

Which pathogen has been observed to undergo pathoadaptative changes in response to the stressful environment of the CF airway?

<p>Pseudomonas aeruginosa (D)</p> Signup and view all the answers

What is the main virulence factor produced by Pseudomonas aeruginosa that can break down lung tissue?

<p>Elastase (B)</p> Signup and view all the answers

Which virulence factor of Staphylococcus aureus binds to antibodies, preventing bacterial opsonization?

<p>Protein A (B)</p> Signup and view all the answers

What type of virulence factor does Burkholderia cepacia complex produce to scavenge iron from the host?

<p>Siderophores (C)</p> Signup and view all the answers

Which pathogen associated with CF lung disease is known for producing biofilms that protect it from the host immune response and antibiotics?

<p>Pseudomonas aeruginosa (C)</p> Signup and view all the answers

What is the specific toxin produced by Pseudomonas aeruginosa that contributes to inflammation and tissue damage in the lungs?

<p>Pyocyanin (D)</p> Signup and view all the answers

Which enzyme produced by Staphylococcus aureus contributes to tissue damage?

<p>Protease (C)</p> Signup and view all the answers

What is the primary effect of alginate produced by Pseudomonas aeruginosa?

<p>Promoting biofilm formation (A)</p> Signup and view all the answers

Which bacterial group produces toxins and enzymes that contribute to tissue damage and inflammation?

<p>Burkholderia cepacia complex (A)</p> Signup and view all the answers

What type of bacteria is Moraxella catarrhalis?

<p>Gram-negative diplococci (A)</p> Signup and view all the answers

Which virulence factor is NOT produced by Stenotrophomonas maltophilia?

<p>Catalase (A)</p> Signup and view all the answers

What infections can be caused by Moraxella catarrhalis according to the text?

<p>Otitis media and sinusitis (D)</p> Signup and view all the answers

Which bacterial species mentioned is fastidious and facultative aerobic?

<p>Hemophilus influenzae (C)</p> Signup and view all the answers

What characteristic distinguishes Hemophilus influenza type B (HiB) from Stenotrophomonas maltophilia?

<p>Presence of capsule (D)</p> Signup and view all the answers

Which bacterium causes endophthalmitis among other infections?

<p>Acromobacter xylosoxidans (D)</p> Signup and view all the answers

In penicillin-resistant infections, which enzyme is commonly produced by Moraxella catarrhalis?

<p>$eta$-lactamase (A)</p> Signup and view all the answers

What distinguishes Stenotrophomonas maltophilia from Acromobacter xylosoxidans based on the text?

<p>Capsule production (A)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Related Documents

More Like This

Lecture 9
18 questions

Lecture 9

SprightlyTourmaline6898 avatar
SprightlyTourmaline6898
CFTR Overview and Mutation Classes
20 questions
Cystic Fibrosis Genetic Testing Quiz
10 questions

Cystic Fibrosis Genetic Testing Quiz

SelfSatisfactionRetinalite2084 avatar
SelfSatisfactionRetinalite2084
Cystic Fibrosis and CFTR Variants
40 questions
Use Quizgecko on...
Browser
Browser