13 results
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
9 species, C. canimorsus ... 13%), Pneumonia, Endocarditis ... microorganism (Culture ... stain: Peripheral smear ... #microbiology #
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood culture ... negative infective endocarditis ... BCNIE #Causes #differential ... #negative #Endocarditis ... InfectiousDiseases #Microbiology
Streptobacillus moniliformis on peripheral smear and culture microscopy
 - blood culture; patient w/ outdoor exposure
 -
on peripheral smear ... and culture microscopy ... - blood culture ... #clinical #microscopy ... #microbiology #
Capnocytophaga Canimorsus Skin Rash

40 M presents w/ N, V, severe epigastric pain. SHx: smoker, drinks 18
Capnocytophaga Canimorsus ... bacillus cause selsis ... to meningitis, endocarditis ... Myocarditis & culture-negative ... is difficult to culture
Capnocytophaga spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
Capnocytophaga spp on Culture ... and Blood Smear ... #Blood #Smear # ... clinical #microscopy ... #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 ... Marantic (NTBE) Differential ... • Blood cultures
Coccidioides on culture and microscopy

This was coccidioides sp (in this particular case was posadasii, although morphologically
Coccidioides on culture ... and microscopy ... empty disjunctor cells ... #Coccidioides #culture ... #microbiology #
Non-Infective Endocarditis (NBTE / Marantic Endocarditis)
Non-infective endocarditis is also known as: Non-bacterial thrombotic endocarditis (NBTE), Aseptic
Non-Infective Endocarditis ... Vegetations may be microscopic ... embolize • Cannot differentiate ... Inflammatory cells ... absent How can we differentiate
Plasmodium falciparum trophozoites (and crenated red blood cells) - Blood Smear

A classic presentation of Plasmodium falciparum
crenated red blood cells ... ) - Blood Smear ... in a thin blood smear ... peripheral #clinical #microscopy ... #malaria #microbiology
Endocarditis - Overview and Differential Diagnosis Framework

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV
Endocarditis - Overview ... and Differential ... Hypercoagulable (APLAS) Microbiology ... : Blood cultures ... #Differential #