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 ... Diseases #Infections ... #Microbiology # ... Micro #Differential
Duke's Criteria for Infective Endocarditis
Definite IE - Pathologic Criteria:
 • Pathologic lesions - vegetation or intracardiac
Duke's Criteria for Infective ... demonstrated by culture ... Immunologic phenomena • Micro ... evidence of active infection ... Duke #criteria #Infective
Capnocytophaga Canimorsus Skin Rash

40 M presents w/ N, V, severe epigastric pain. SHx: smoker, drinks 18
fastidious gram-negative ... Myocarditis & culture-negative ... C. canimorsus infection ... infection should ... #photo
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... Infective Endocarditis ... • Infection with ... special media) • Infection ... #Infective #Endocarditis
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 spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
Capnocytophaga spp ... anaerobe; narrow Gram negative ... richdavisphd #Capnocytophaga ... #Smear #clinical ... #microscopy #microbiology
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
the majority of infections ... • Gram-negative ... microorganism (Culture ... fusiform gram-negative ... #canimorsus #microbiology
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
result with no clinical ... developing active infection ... • Tuberculosis infection ... Mycobacterial culture ... Extrapulmonary infection
Differentiating NBTE from Infective Endocarditis
No pathognomonic signs/symptoms or echo features that are specific to NBTE, and
Differentiating NBTE from Infective ... high index of clinical ... Frequent false-negative ... infarcts Features of Infective ... Endocarditis #comparison #infective
Listeriosis Summary - Listeria Monocytogenes
Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming
Risk
food, salad bar Clinical ... Pregnancy • CNS infection ... available • Blood culture ... ) • CSF (CNS Infection ... infectiousdiseases #treatment #microbiology