169 results
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood ... culture negative ... #differential #diagnosis ... #causes #culture ... InfectiousDiseases #Microbiology
Stool Cultures - Indications in Diarrhea
Patient Categories to Order Stool Cultures On:
 • Persisting 1 week
Stool Cultures - ... to Order Stool Cultures ... Few infectious causes ... positive stool culture ... #Indications #diagnosis
Corynebacterium diphtheriae on Culture and Microscopy
Corynebacterium diphtheriae, the cause of vaccine-preventable diphtheria.

Matching name to features:
"Coryne" (korune)
diphtheriae on Culture ... diphtheriae, the cause ... #diphtheriae #Culture ... Microscopy #clinical #microbiology
Septic Arthritis: Pathogenesis and clinical findings
Notes:
- Septic Arthritis is typically monoarticular & the knee is involved
involved in >50% of cases ... & often a +ve culture ... Microbiology: ... S.A. can also be caused ... pathophysiology #diagnosis
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures
 - Did they receive antibiotics prior
Negative Blood Cultures ... antibiotics prior to cultures ... therapy - Number one cause ... of culture negative ... BloodCultures #Diagnosis
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
Streptocccus Pneumoniae Microbiology ... • Most common cause ... media • Important cause ... Diagnosis: • Physical ... sinus • Sputum culture
Blood culture contaminants
Grouped by gram negative vs gram positive vs other as well as never/maybe/probably
Some additional
Blood culture contaminants ... #Infections #Microbiology ... Differential #Ddx #Diagnosis
Listeriosis Summary - Listeria Monocytogenes
Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming
Risk
CNS infection Diagnosis ... : • Stool culture ... available • Blood culture ... Monocytogenes #diagnosis ... infectiousdiseases #treatment #microbiology
Listeriosis Summary - Listeria Monocytogenes
Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming
Risk
CNS infection Diagnosis ... : • Stool culture ... available • Blood culture ... Monocytogenes #diagnosis ... infectiousdiseases #treatment #microbiology
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Hypercoagulable (APLAS) Microbiology ... Septic Emboli Cause ... Differential Diagnosis ... Endocarditis Diagnosis ... Treat underlying cause