15 results
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood ... culture negative ... identified with modern culture ... #culture #negative ... #Endocarditis #InfectiousDiseases
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
ACTIVE TB AFB smear ... microscopy • Testing ... Mycobacterial culture ... of a NAAT on a smear-positive ... LatentTB #ActiveTB #InfectiousDiseases
Capnocytophaga spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
and Blood Smear ... oral flora, can cause ... anaerobe; narrow Gram negative ... #Blood #Smear # ... clinical #microscopy
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... Negative Abscess ... antibiotics as a cause ... of a negative culture ... Differential #Diagnosis #InfectiousDiseases
Prolymphocytes

In our case, the patient has T-prolymphocytic leukemia (T-PLL) not Acute Myeloid Leukemia (AML).  🔬Tumor
Prolymphocytes In our case ... 🔬Tumor cells are ... size lymphoid cells ... Prolymphocytes #Smear ... Peripheral #Pathology #Microscopy
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... remain negative ... but important causes ... #BloodCulture #Negative ... differential #workup #infectiousdiseases
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
infections • Gram-negative ... microorganism (Culture ... stain: Peripheral smear ... fusiform gram-negative ... microbiology #zoonotic #infectiousdiseases
Coccidioides on culture and microscopy

This was coccidioides sp (in this particular case was posadasii, although morphologically
Coccidioides on culture ... and microscopy ... this particular case ... empty disjunctor cells ... #Coccidioides #culture
Moraxella catarrhalis on culture and microscopy
Only 1-5% of adults are colonized with this Gram neg diplococci
catarrhalis on culture ... and microscopy ... It can be the cause ... ) - Gram negative ... #catarrhalis #culture
Myelodysplastic Syndromes (MDS)

What?
Myelodysplastic syndromes are a group of disorders caused by blood cells that are poorly
group of disorders caused ... Peripheral Smear ... Out Secondary Causes ... abnormal under a microscope ... Peripheral blood smear