73 results
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
Histoplasma) - Culture ... negative bacilli ... streptococci - Culture ... Pathogens #Diagnosis #Differential ... #InfectiousDiseases
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
negative infective ... BCNIE #Causes #differential ... #negative #Endocarditis ... #InfectiousDiseases ... #CNIE #BCNIE #cardiology
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... Negative Abscess ... - Differential ... #Differential # ... Diagnosis #InfectiousDiseases
Endocarditis Algorithm - Infective vs Noninfective Causes
Noninfective:
 • Malignancy
 • Autoimmune disease
 • Systemic infection
Native Valve
Systemic infection Native ... • HACEK • Culture-negative ... epidermidis • Gram-negative ... Enterococcus • Gram-negative ... Noninfective #Causes #Differential
Epidemiological Clues That May be Helpful in Defining the Etiological Diagnosis of Culture-Negative Endocarditis

#Endocarditis #Bacteria #Differential
Etiological Diagnosis of Culture-Negative ... Endocarditis #Bacteria #Differential
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... remain negative ... #BloodCulture #Negative ... Endocarditis #diagnosis #differential ... #workup #infectiousdiseases
Bacteremia Quick Reference - Treatment Duration

Gram Negative Bacteremia:
 • Avoid: Aminoglycosides and tigecycline
 • Catheters should
Duration Gram Negative ... • No follow up cultures ... Follow-up blood 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 ... Liquid and solid cultures ... Mycobacterial culture ... LatentTB #ActiveTB #InfectiousDiseases
Blood culture contaminants
Grouped by gram negative vs gram positive vs other as well as never/maybe/probably
Some additional
Blood culture contaminants ... Grouped by gram negative ... Microbiology #Micro #Differential
Bandemia Overview

Normal: < 1%
Clinically significant: > 10%

Band neutrophils are slightly less mature than segmented neutrophils and
Neutrophil (Normal) Differential ... having positive cultures ... likelihood of negative ... indicator of infection relative ... #Bandemia #differential