8 results
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... negative culture Brain ... : Aspergillus, Cryptococcus ... nocardia - Fungal: Cryptococcus ... Coccidiomycosis, Cryptococcus
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
• Most common cause ... : • 80% have fever ... Intervention: - Fevers ... Dermatitidis - Cryptococcus ... #differential #causes
CNS Ring-Enhancing Lesions - Immunocompromised vs Immunocompetent
Multiple Ring-Enhancing Lesions:
 • Toxoplasmosis (CD4 < 100)
 • Other
histoplasmosis, cryptococcus ... Syphilis • Pyogenic Abscess ... RingEnhancing #Lesions #Brain ... differential #diagnosis #causes
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
positive in 90% of IE cases ... Aspergillus • Cryptococcus ... night sweats, fever ... Septic Emboli Cause ... Persistent bacteremia/fevers
Differentiating NBTE from Infective Endocarditis
No pathognomonic signs/symptoms or echo features that are specific to NBTE, and
Clinical features: Fever ... valves • MRI brain ... in up to 30% of cases ... common, Aortic root abscess ... Marantic #diagnosis #table
CNS Infection in HIV / AIDS - Differential Diagnosis Framework

Principles of HIV-Associated CNS Opportunistic Infections:
 •
present in 15% of cases ... • Symptoms: Fever ... tuberculomas, or abscesses ... culture positive Cryptococcal ... lesions • CSF cryptococcal
Endocarditis - Overview and Differential Diagnosis Framework

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV
positive in 90% of IE cases ... Aspergillus • Cryptococcus ... night sweats, fever ... Septic emboli cause ... Persistent bacteremia/fevers
Cryptococcal meningitis on T2 MRI
30 M from sub-Saharan Africa presents w/ progressive Headache x1 mo, +neck
Cryptococcal meningitis ... Cryptococcal meningitis ... Nausea & vomiting ... IUIDfellowship #Cryptococcal ... meningitis #T2 #MRI #Brain