Infective Endocarditis: Symptoms and Causes
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Questions and Answers

Which pathogen is most likely responsible for endocarditis presenting with low-grade fever, malaise, and weight loss?

  • Viridans streptococci (correct)
  • Coxiella burnetii
  • Bartonella spp.
  • Pseudomonas

What is the characteristic manifestation of endocarditis associated with high virulence pathogens such as Coxiella burnetii?

  • Tender nodules on the fingers due to immune complex deposition
  • Splinter hemorrhages on the nail bed
  • Round white spots on the retina surrounded by hemorrhage (correct)
  • Painless, erythematous lesions on the palm or sole

Which type of endocarditis is typically associated with IV drug use?

  • Mitral valve endocarditis
  • Murmur endocarditis
  • Valve endocarditis
  • Tricuspid endocarditis (correct)

Which organism is commonly associated with native valve endocarditis due to pulmonary emboli?

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

What is the diagnostic significance of three or more positive blood cultures taken over more than 1 hour in infective endocarditis?

<p>Definite diagnosis based on 2 major criteria (C)</p> Signup and view all the answers

Which condition is NOT considered a minor criterion for the diagnosis of infective endocarditis?

<p>Positive echocardiographic findings of vegetations (A)</p> Signup and view all the answers

Which type of infective endocarditis is associated with a rapid progression and high mortality rate if left untreated?

<p>Acute infective endocarditis caused by S.aureus (C)</p> Signup and view all the answers

Which organism is the most common cause of infective endocarditis associated with native valves, especially on damaged valves?

<p>S.viridines (D)</p> Signup and view all the answers

What is the most common cause of early-onset infective endocarditis in patients with prosthetic heart valves within 60 days of surgery?

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

What type of cardiac abnormality is NOT considered a risk factor for infective endocarditis?

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

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