21 results
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
9 species, C. canimorsus ... infections • Gram-negative ... 13%), Pneumonia, Endocarditis ... #microbiology # ... zoonotic #infectiousdiseases
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
for Infective Endocarditis ... epidermidis - Gram-negative ... ) - Culture negative ... #Infective #Endocarditis ... #Differential #InfectiousDiseases
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
blood culture negative ... infective endocarditis ... #Endocarditis # ... InfectiousDiseases ... #Microbiology #
HACEK is the acronym commonly used to describe and help doctors to remember a group of
fastidious Gram-negative ... cause infective endocarditis ... less than 3% of endocarditis ... More commonly endocarditis ... #Diagnosis #InfectiousDiseases
Infective endocarditis - etiology and sources of infection. 
 • Native and prosthetic 
valve endocarditis
 •
Infective endocarditis ... • Native and ... prosthetic valve endocarditis ... #Infective #Endocarditis ... #Differential #Microbiology
Capnocytophaga Canimorsus Skin Rash

40 M presents w/ N, V, severe epigastric pain. SHx: smoker, drinks 18
Capnocytophaga Canimorsus ... C. canimorsus fastidious ... gram-negative bacillus ... to meningitis, endocarditis ... Myocarditis & culture-negative
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 ... Meningitis 10-14 days, Endocarditis ... Pneumoniae #strep #microbiology
Capnocytophaga
GNR with long fusiform shape.  Fastidious facultative anaerobe that grows slowly and needs enriched agar
C.
enriched agar C. animorsus ... febrilepodcast] #InfectiousDiseases ... Diagnosis #Cats #Dogs #Microbiology ... #CAnimorsus
Psittacosis 
Pathogen: Chlamydia psittaci - obligate intracellular gram negative
Transmission:
 • Birds are the primary reservoir
 •
intracellular gram negative ... Chlamydia #psittaci #microbiology ... management #treatment #infectiousdiseases
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... Infective Endocarditis ... cultures remain negative ... #Infective #Endocarditis ... differential #workup #infectiousdiseases