6 results
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
bacilli - Fungi (Candida ... , Aspergillus, Histoplasma ... ) - Culture negative ... streptococci - Culture ... #Differential #InfectiousDiseases
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
negative infective ... whipplei, Fungi (Aspergillus ... , Candida), Mycoplasma ... #InfectiousDiseases ... #CNIE #BCNIE #cardiology
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... remain negative ... whipplei, Fungi (Aspergillus ... , Candida), Mycoplasma ... differential #workup #infectiousdiseases
Important Fungal Stains
Mycology Lab:
 • Calcofluor white - Fluorochrome that binds glucans and chitin in fungal
preparation from culture ... exceptions are Aspergillus ... • India ink - "Negative ... #microbiology #microscopy ... fungi #fungus #comparison
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Hypercoagulable (APLAS ... • Coagulase-negative ... Tropheryma Whipplei • Aspergillus ... • Blood cultures ... diagnosis #management #cardiology
Endocarditis - Overview and Differential Diagnosis Framework

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV
Hypercoagulable (APLAS ... Negative: • Bartonella ... Tropheryma Whipplei • Aspergillus ... Differential #Diagnosis #cardiology ... #infectiousdiseases