13 results
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Culture Negative Abscess ... negative culture Brain ... , Cryptococcus, ... nocardia - Fungal: Cryptococcus ... Coccidiomycosis, Cryptococcus
Important Fungal Stains
Mycology Lab:
 • Calcofluor white - Fluorochrome that binds glucans and chitin in fungal
exceptions are Aspergillus ... polysaccharide capsule of Cryptococcus ... detection for cryptococcal ... mucopolysaccharide capsule of Cryptococcus ... fungi #fungus #comparison
Fungal Pneumonias - Diagnosis Comparison Table
 • Aspergillus
 • Blastomyces
 • Candida
 • Coccidioides
 • Cryptococcus
Pneumonias - Diagnosis Comparison ... Table • Aspergillus ... Coccidioides • Cryptococcus ... Pneumonias #Diagnosis #Comparison
Fungal Biomarkers: Comparing Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 •
Beta-D-Glucan and Aspergillus ... Spec ~77-96% Aspergillus ... constituent of Aspergillus ... Paecilomyces, Cryptococcus ... Galactomannan #diagnosis #comparison
CNS Ring-Enhancing Lesions - Immunocompromised vs Immunocompetent
Multiple Ring-Enhancing Lesions:
 • Toxoplasmosis (CD4 < 100)
 • Other
histoplasmosis, cryptococcus ... , and aspergillus ... Syphilis • Pyogenic Abscess ... RingEnhancing #Lesions #Brain
Differential diagnosis of Skin + Eye infections
 • Bacterial: Staph spp, Strep spp, Pseudomonas spp, Bartonella,
: Candida spp, Aspergillus ... spp, Cryptococcus ... tuberculosis, M. abscessus
Fungal Biomarkers: Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 • Pathogens:
Beta-D-Glucan and Aspergillus ... Pathogens: Candida, Aspergillus ... - Negative: Cryptococcus ... Paecilomyces, Cryptococcus ... Galactomannan #diagnosis #comparison
Concurrent Brain and Lung Lesions
 • Bacteria: Nocardia spp, Strep anginosus, Staph aureus, Klebsiella pneumoniae (hypervirulent),
Concurrent Brain ... ) • Fungi: Aspergillus ... Mucormycosis, Cryptococcus ... febrilepodcast #Brain
Concurrent Brain and Lung Lesions
 • Bacteria: Nocardia spp, Strep anginosus, Staph aureus, Klebsiella pneumoniae (hypervirulent),
Concurrent Brain ... ) • Fungi: Aspergillus ... Mucormycosis, Cryptococcus ... febrilepodcast #Brain
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Tropheryma Whipplei • Aspergillus ... • Cryptococcus ... suggests perivalvular abscess ... annular or aortic abscess ... Complications: Abscess