48 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 ... #Infections #Microbiology ... #Micro #Differential
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
infections • Gram-negative ... microorganism (Culture ... fusiform gram-negative ... #canimorsus #microbiology ... infectiousdiseases #diagnosis #management
Capnocytophaga spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
Capnocytophaga spp ... on Culture and ... anaerobe; narrow Gram negative ... richdavisphd #Capnocytophaga ... clinical #microscopy #microbiology
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures
 - Did they receive antibiotics prior
Endocarditis (IE) Has Negative ... Blood Cultures ... antibiotics prior to cultures ... negative IE - ... BloodCultures #Diagnosis #Management
By Marcela Santana @Marcelaaos via Febrile [febrilepodcast.com @febrilepodcast]
#ID  #Infectious Diseases  #Infections
#Microbiology #Micro
#Leptospirosis #Leptospira #management
#Infections #Microbiology ... #Micro #Leptospirosis ... #Leptospira #management
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood culture ... negative infective ... diagnosis #causes #culture ... #negative #Endocarditis ... InfectiousDiseases #Microbiology
Capnocytophaga Canimorsus Skin Rash

40 M presents w/ N, V, severe epigastric pain. SHx: smoker, drinks 18
Capnocytophaga Canimorsus ... fastidious gram-negative ... Myocarditis & culture-negative ... is difficult to culture ... identify severe Capnocytophaga
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
Streptocccus Pneumoniae Microbiology ... Alpha-hemolytic, Catalase Negative ... sinus • Sputum culture ... Pneumoniae #strep #microbiology ... #diagnosis #management
Psittacosis 
Pathogen: Chlamydia psittaci - obligate intracellular gram negative
Transmission:
 • Birds are the primary reservoir
 •
intracellular gram negative ... test • PCR • Culture ... Chlamydia #psittaci #microbiology ... #diagnosis #management
How to Determine a Contaminant vs True Infection 

What is the organism? Most 
common contaminants:
• Coagulase-negative ... How many blood culture ... species from the micro