61 results
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood culture ... negative infective endocarditis ... #negative #Endocarditis ... #InfectiousDiseases ... #Microbiology #
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
for Infective Endocarditis ... Histoplasma) - Culture ... streptococci - Culture ... #Infective #Endocarditis ... #Differential #InfectiousDiseases
Endocarditis checklist
Initial evaluation
 • Peripheral blood cultures (three sets at three different sites)
 • Additional culture
Endocarditis checklist ... suspect right-sided endocarditis ... • Aggressive management ... Critical Care #Endocarditis ... criticalcare #diagnosis #management
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures
 - Did they receive antibiotics prior
with Infective Endocarditis ... Negative Blood Cultures ... antibiotics prior to cultures ... #Infective #Endocarditis ... BloodCultures #Diagnosis #Management
Listeriosis Summary - Listeria Monocytogenes
Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming
Risk
Diagnosis: • Stool culture ... available • Blood culture ... Monocytogenes #diagnosis #management ... #infectiousdiseases ... #treatment #microbiology
Listeriosis Summary - Listeria Monocytogenes
Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming
Risk
Diagnosis: • Stool culture ... available • Blood culture ... Monocytogenes #diagnosis #management ... #infectiousdiseases ... #treatment #microbiology
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
Streptocccus Pneumoniae Microbiology ... peritonitis, and endocarditis ... sinus • Sputum culture ... Pneumoniae #strep #microbiology ... #diagnosis #management
Blood Culture Collection Algorithm - Adult Patients with Suspected Systemic Infection 

Pawlowicz et al evidenced based
Blood Culture Collection ... to obtain blood cultures ... drawing blood cultures ... tract infection, endocarditis ... #Management #BloodCultures
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Hypercoagulable (APLAS) Microbiology ... : Blood cultures ... 90% of IE cases Culture ... • Blood cultures ... #diagnosis #management
Coverage of common antibiotics used in the hospital

For empiric coverage, first define the type of infection,
then review prior cultures ... Obtain cultures ... ampicillin #management ... #infectiousdisease ... #antibiogram #pharmacology