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Epidemiological Clues That May be Helpful in Defining the Etiological Diagnosis of Culture-Negative Endocarditis

#Endocarditis #Bacteria #Differential
Culture-Negative Endocarditis ... #Endocarditis ... #Bacteria #Differential
Non-Infective Endocarditis - Pathophysiology
Non-infective Endocarditis Pathophysiology:
 • Valves usually undamaged - Etiology poorly understood but thought
Non-Infective Endocarditis ... Non-infective Endocarditis ... rare Infective Endocarditis ... endothelium is common → Bacteria ... over clusters of bacteria
Infective endocarditis - etiology and sources of infection. 
 • Native and prosthetic 
valve endocarditis
 •
Infective endocarditis ... prosthetic valve endocarditis ... #Infective #Endocarditis ... Sources #Causes #Bacteria
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures
 - Did they receive antibiotics prior
with Infective Endocarditis ... have a fastidious bacteria ... this be a non-bacterial ... #Infective #Endocarditis
HACEK is the acronym commonly used to describe and help doctors to remember a group of
cause infective endocarditis ... less than 3% of endocarditis ... caused by HACEK bacteria ... More commonly endocarditis ... HACEK #Organisms #Endocarditis
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
for Infective Endocarditis ... #Infective #Endocarditis ... #Bacteria #Pathogens
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
recovery rate of bacteria ... highly fastidious bacteria ... intra-cellular bacteria ... under BCNIE, these bacteria ... Valvular 16S (bacteria
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
negative infective endocarditis ... under BCNIE, these bacteria ... culture #negative #Endocarditis
Differential Diagnosis of Acute Arthritis

Crystal-induced arthritis: Calcium oxalate, gout, cholesterol, pseudogout, hydroxyapatite crystals

Infectious arthritis: Bacteria, fungi,
Infectious arthritis: Bacteria ... Systemic infection: Bacterial ... endocarditis, human
Causes of Antibiotic Failure - Differential Diagnosis Framework
Diagnosis:
 • Non-Infectious: Malignant, Autoimmune, Drug-related (NMS, serotonin syndrome,
Bug: Atypical bacteria ... Aggressive: MRSA bacteremia ... lines, osteo, endocarditis