10 results
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
for Infective Endocarditis ... bacilli - Fungi (Candida ... , Aspergillus, Histoplasma ... ) - Culture negative ... #Differential #InfectiousDiseases
Fungal Pneumonias - Diagnosis Comparison Table
 • Aspergillus
 • Blastomyces
 • Candida
 • Coccidioides
 • Cryptococcus
Diagnosis Comparison Table ... • Aspergillus ... Blastomyces • Candida ... Diagnosis #Comparison #Table ... #microbiology #infectiousdiseases
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
negative infective endocarditis ... whipplei, Fungi (Aspergillus ... , Candida), Mycoplasma ... #negative #Endocarditis ... #InfectiousDiseases
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures
 - Did they receive antibiotics prior
with Infective Endocarditis ... Negative Blood Cultures ... Fungal (Histoplasma/Aspergillus ... patient a surgical candidate ... #Infective #Endocarditis
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Infective Endocarditis ... whipplei, Fungi (Aspergillus ... , Candida), Mycoplasma ... Negative #Infective #Endocarditis ... differential #workup #infectiousdiseases
Common Fungal Pathology 
 • Candida - Small yeast intermingled with pseudohyphae
 • Aspergillosis - Septate
Pathology • Candida ... Pathology #clinical #microscopy ... #table #atlas #
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Hypercoagulable (APLAS ... 90% of IE cases Culture ... staphylococci Culture ... Tropheryma Whipplei • Aspergillus ... • Blood cultures
Endocarditis - Overview and Differential Diagnosis Framework

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV
Endocarditis - Overview ... Hypercoagulable (APLAS ... Tropheryma Whipplei • Aspergillus ... #Endocarditis ... Diagnosis #cardiology #infectiousdiseases
Important Fungal Stains
Mycology Lab:
 • Calcofluor white - Fluorochrome that binds glucans and chitin in fungal
preparation from culture ... exceptions are Aspergillus ... #microbiology #microscopy ... fungus #comparison #table
Mycoses

HISTOPLASMOSIS
• Inhalation of conidia → Yeast → travel to lymph nodes → spread in body
• Bird
• Confirmed by culture ... ASPERGILLOSIS • Aspergillus ... Diagnosis: • Culture ... arthritis, and endocarditis ... ) #Mycoses #InfectiousDiseases