14 results
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures
 - Did they receive antibiotics prior
My Patient with Infective ... Endocarditis (IE ... Ahmed_HBabiker #Infective ... #Endocarditis # ... Negative #BloodCultures
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 ... #Infections #Microbiology ... #Micro #Differential ... Ddx #Diagnosis #Bloodculture
Duke's Criteria for Infective Endocarditis
Definite IE - Pathologic Criteria:
 • Pathologic lesions - vegetation or intracardiac
Duke's Criteria for Infective ... Endocarditis Definite ... demonstrating active endocarditis ... Immunologic phenomena • Micro ... #Endocarditis #
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood culture ... negative infective ... endocarditis Bartonella ... #negative #Endocarditis ... InfectiousDiseases #Microbiology
Blood Culture Collection Algorithm - Adult Patients with Suspected Systemic Infection 

Pawlowicz et al evidenced based
Suspected Systemic Infection ... infections, whose clinical ... urinary tract infection ... , endocarditis, ... #Management #BloodCultures
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... Infective Endocarditis ... antimicrobials, clinical ... ID_fellows #BCNIE #BloodCulture ... #Negative #Infective
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
infections • Gram-negative ... 13%), Pneumonia, Endocarditis ... microorganism (Culture ... fusiform gram-negative ... #canimorsus #microbiology
How to Determine a Contaminant vs True Infection 

What is the organism? Most 
common contaminants:
Contaminant vs True Infection ... • Coagulase-negative ... How many blood culture ... species from the micro ... Jennifer Babik #BloodCultures
Capnocytophaga spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
Capnocytophaga spp ... anaerobe; narrow Gram negative ... richdavisphd #Capnocytophaga ... #Smear #clinical ... #microscopy #microbiology
Differentiating NBTE from Infective Endocarditis
No pathognomonic signs/symptoms or echo features that are specific to NBTE, and
Differentiating NBTE from Infective ... high index of clinical ... serology: Serial negative ... Frequent false-negative ... /serology: + (Negative