18 results
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
bacilli - Fungi ... Histoplasma) - Culture ... bacilli - Fungi ... streptococci - Culture ... #Differential #InfectiousDiseases
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... Negative Abscess ... as a cause of a negative ... culture Brain: ... Differential #Diagnosis #InfectiousDiseases
Important Fungal Stains
Mycology Lab:
 • Calcofluor white - Fluorochrome that binds glucans and chitin in fungal
Important Fungal ... and chitin in fungal ... preparation from culture ... polysaccharide component ... • India ink - "Negative
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
negative infective ... Tropheryma whipplei, Fungi ... these bacteria should ... #negative #Endocarditis ... #InfectiousDiseases
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... remain negative ... fastidious bacteria or fungi ... these bacteria should ... differential #workup #infectiousdiseases
CAPD-associated peritonitis (Continuous Ambulatory Peritoneal Dialysis) - 5 Things To Know
Diagnosis (Two of the following):
(1) Clinical
Positive effluent culture ... • 15-35% Gram negative ... Polymicrobial should ... negative peritonitis ... Diagnosis #Management #InfectiousDiseases
Bacteremia Quick Reference - Treatment Duration

Gram Negative Bacteremia:
 • Avoid: Aminoglycosides and tigecycline
 • Catheters should
Duration Gram Negative ... • Catheters should ... • No follow up cultures ... are negative ... Management #Duration #infectiousdiseases
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
because false-negative ... Mycobacterial culture ... used to exclude pulmonary ... Mycobacterial culture ... LatentTB #ActiveTB #InfectiousDiseases
Fungal Biomarkers: Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 • Pathogens:
Fungal Biomarkers ... Polysaccharide cell wall component ... Coccidioides - Negative ... synthetic now and should ... Cryptococcus - Negative
Candidemia Workup and Management - IDSA Guidelines
1) Antibiotics
 • Empiric: Echinocandins (e.g. micafungin) for most patients
Susceptibilities, Negative ... Cultures • Length ... venous line, it should ... candidiasis #treatment #fungal