ID:IOTS - Infectious Disease Insight Of Two Specialists 11. Suspecting Infective Endocarditis
Nov 3, 2021
Jame and Callum dive into the complexities of infective endocarditis, discussing its definition and causative organisms, especially the notorious staphylococcus aureus. They explore key risk factors like intravenous drug use and the importance of blood cultures for accurate diagnosis. The hosts also cover diagnostic challenges, comparing imaging techniques, and the evolving criteria for assessing this serious condition. An intriguing link between streptococcus bovis and colorectal cancer is highlighted, adding another layer to this critical topic.
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Endocarditis Defined And Causes
- Endocarditis is inflammation of the endocardium usually caused by bacterial or fungal infection and often forms vegetations.
- Non-infective causes (eg. autoimmune, malignancy) exist but are rare compared with infective cases.
Main Causative Organisms
- Staphylococcus aureus and streptococci cause the majority of infective endocarditis cases.
- Enterococci and coagulase-negative staphylococci matter especially with prosthetic valves or specific clinical contexts.
HACEK And Fungal Causes
- The HACEK group are fastidious gram-negatives that often cause culture-negative endocarditis and need prolonged incubation.
- Fungal endocarditis is rarer and commonly linked to prosthetic material or severe immunosuppression.