6101 results
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood culture ... identified with modern culture ... #differential #diagnosis ... #causes #culture ... InfectiousDiseases #Microbiology
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
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
Streptocccus Pneumoniae Microbiology ... Diagnosis: • Physical ... sinus • Sputum culture ... Pneumoniae #strep #microbiology ... #diagnosis #management
Plate Colony Color Identification Algorithm
 - Pink Colonies
 - Turquoise Blue Colonies
 - Blue-Purple Colonies
 -
Identification #Algorithm #diagnosis ... #microbiology # ... culture #colonies
Psittacosis 
Pathogen: Chlamydia psittaci - obligate intracellular gram negative
Transmission:
 • Birds are the primary reservoir
 •
hemoptysis, diarrhea Diagnosis ... test • PCR • Culture ... Chlamydia #psittaci #microbiology ... #diagnosis #management
Septic Arthritis: Pathogenesis and clinical findings
Notes:
- Septic Arthritis is typically monoarticular & the knee is involved
& often a +ve culture ... Microbiology: ... pathophysiology #diagnosis
Diarrhea Workup and Management Algorithm in Transplant Patients
First Tier Microbiologic-Testing:
1. C. difficile PCR (Stool)
2. CMV qPCR
Patients First Tier Microbiologic-Testing ... Bacterial culture ... pathogens First Tier Microbiologic-Testing ... Algorithm #Transplant #diagnosis
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Hypercoagulable (APLAS) Microbiology ... : Blood cultures ... Differential Diagnosis ... Endocarditis Diagnosis ... #Endocarditis #diagnosis