490 results
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
Gram-negative bacilli - Fungi ... Histoplasma) - Culture ... Gram-negative bacilli - Fungi ... streptococci - Culture
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... separate blood cultures ... fastidious bacteria or fungi ... Tropheryma whipplei, Fungi ... bacteria) and 18S ( fungi
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood culture ... Tropheryma whipplei, Fungi ... identified with modern culture ... diagnosis #causes #culture
Alternaria on Culture Plate and Microscopy
Adult w/ aplastic anemia, getting regular blood product infusions. Had Group
Alternaria on Culture ... had blood fungal cultures ... environmental fungi ... #Alternaria #Culture
Endocarditis Algorithm - Infective vs Noninfective Causes
Noninfective:
 • Malignancy
 • Autoimmune disease
 • Systemic infection
Native Valve
• HACEK • Culture-negative ... Gram-negative bacilli • Fungi ... Gram-negative bacilli • Fungi
Phoma spp on Culture and Microscopy

Phoma spp. are a group of soil-dwelling fungi that grow spreading
Phoma spp on Culture ... soil-dwelling fungi ... #microbiology #culture
Important Fungal Stains
Mycology Lab:
 • Calcofluor white - Fluorochrome that binds glucans and chitin in fungal
preparation from culture ... cell response to fungi ... doesn't stain most fungi ... staining #diagnosis #fungi
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... of a negative culture ... Scedosporium, endemic fungi ... Kumfer @AnnKumfer #Culture
Septic Arthritis: Pathogenesis and clinical findings
Notes:
- Septic Arthritis is typically monoarticular & the knee is involved
& often a +ve culture ... be caused by, fungi
Histoplasma capsulatum on Microscopy
Dimorphic Fungi. Cultures don't look especially unique (see also: other dimorphs Cocci and
Microscopy Dimorphic Fungi ... Cultures don't look