16 results
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
negative infective endocarditis ... under BCNIE, these bacteria ... #InfectiousDiseases ... #Microbiology # ... CNIE #BCNIE #cardiology
HACEK is the acronym commonly used to describe and help doctors to remember a group of
which can also cause ... is caused by HACEK ... bacteria. ... is caused by Alpha-haemolytic ... #Diagnosis #InfectiousDiseases
Infective endocarditis - etiology and sources of infection. 
 • Native and prosthetic 
valve endocarditis
 •
Infective endocarditis ... prosthetic valve endocarditis ... #Sources #Causes ... #Bacteria #Etiology ... #Differential #Microbiology
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
Streptocccus Pneumoniae Microbiology ... • Most common cause ... media • Important cause ... peritonitis, and endocarditis ... Pneumoniae #strep #microbiology
Infective Endocarditis - Indications for Surgery - "Fun-HEARTS" Mnemonic

Fungal endocarditis
Heart failure (valve dysfunction)
Enterococcus (VRE) endocarditis
Abscess, annular
Infective Endocarditis ... Mnemonic Fungal endocarditis ... Time, sustained bacteremia ... cardiothoracic #cardiology ... #infectiousdiseases
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Culture-Negative Infective Endocarditis ... but important causes ... factors: - Serology ... Negative #Infective #Endocarditis ... differential #workup #infectiousdiseases
Major Brain Complications of Endocarditis
Abscess:
 • May be macro or micro and occur at site of
Complications of Endocarditis ... due to direct bacterial ... Ischemic stroke caused ... caseyalbin #endocarditis ... #neurological #neurology
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Hypercoagulable (APLAS) Microbiology ... Septic Emboli Cause ... Treat underlying cause ... • Persistent bacteremia ... diagnosis #management #cardiology
Differentiating NBTE from Infective Endocarditis
No pathognomonic signs/symptoms or echo features that are specific to NBTE, and
from Infective Endocarditis ... Features of Non-Bacterial ... Blood cultures/serology ... Blood cultures/serology ... in up to 30% of cases
Etiology of community acquired empyema determined by 16S rRNA sequencing. MRSA=meticillin resistant Staphylococcus aureus; MSSA=meticillin sensitive
Empyema #Pathogens #Microbiology ... #InfectiousDisease ... #Causes #Bacterial ... #Causes #Differential