46 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
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
Responsible for Infective ... Histoplasma) - Culture ... streptococci - Culture ... negative #Infective ... Pathogens #Diagnosis #Differential
Endocarditis Algorithm - Infective vs Noninfective Causes
Noninfective:
 • Malignancy
 • Autoimmune disease
 • Systemic infection
Native Valve
Endocarditis Algorithm - Infective ... disease • Systemic infection ... • HACEK • Culture-negative ... epidermidis • Gram-negative ... Noninfective #Causes #Differential
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
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood culture ... negative infective ... BCNIE #Causes #differential ... #negative #Endocarditis ... InfectiousDiseases #Microbiology
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
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
Capnocytophaga ... infections • Gram-negative ... microorganism (Culture ... fusiform gram-negative ... #canimorsus #microbiology
Infective endocarditis - etiology and sources of infection. 
 • Native and prosthetic 
valve endocarditis
 •
Infective endocarditis ... and sources of infection ... • Native and ... Bacteria #Etiology #Differential ... #Microbiology #
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 ... is difficult to culture ... infection should
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... remain negative ... antimicrobials, clinical ... #BloodCulture #Negative ... #diagnosis #differential