31 results
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 ... febrilepodcast] #ID ... #Infections #Microbiology ... #Differential #Ddx
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
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures
 - Did they receive antibiotics prior
with Infective Endocarditis ... (IE) Has Negative ... Blood Cultures ... negative IE - ... #Infective #Endocarditis
Abiotrophia defectiva on Blood Culture and Microscopy
 - only growing on Chocolate Agar
 - Gram pos
Abiotrophia defectiva on Blood ... Culture and Microscopy ... defectiva #clinical #microscopy ... #microbiology # ... culture
Osler's Nodes in a patient with infective endocarditis

67yo presents with R occipital intraparenchymal hemorrhage (IPH) attributed
with infective endocarditis ... develops fever and ID ... What’s your ddx? ... Blood cultures ( ... TTE negative but
Differentiating NBTE from Infective Endocarditis
No pathognomonic signs/symptoms or echo features that are specific to NBTE, and
from Infective Endocarditis ... : Serial negative ... blood cultures ... Frequent false-negative ... : + (Negative blood
Acinetobacter baumanii on culture and microscopy
 - MacConkey agar - Lactose Negative
 - gram negative (often
and microscopy ... - gram negative ... violet esp. from blood ... #microbiology # ... culture
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
Streptocccus Pneumoniae Microbiology ... Alpha-hemolytic, Catalase Negative ... peritonitis, and endocarditis ... sinus • Sputum culture ... Pneumoniae #strep #microbiology
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 ... • Coagulase-negative ... • Blood cultures
Capnocytophaga spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
and Blood Smear ... anaerobe; narrow Gram negative ... #Blood #Smear # ... clinical #microscopy ... #microbiology