28 results
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... - Differential ... Diagnosis Framework ... antibiotics as a cause ... #Diagnosis #InfectiousDiseases
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
bacilli - Fungi ... bacilli - Fungi ... Bacteria #Pathogens #Diagnosis ... #Differential # ... InfectiousDiseases
Transplant Infections Timeline
Pre-transplant:
 • Common bacteria (endogenous): Staphylococci (skin), Gram-negative bacilli (gut)
 • Viruses: HSV (reactivation)
Engraftment:
Staphylococci (skin), Gram-negative ... Staphylococci (skin), Gram-negative ... Infections #Timeline #differential ... #diagnosis #causes ... #infectiousdiseases
Endocarditis Algorithm - Infective vs Noninfective Causes
Noninfective:
 • Malignancy
 • Autoimmune disease
 • Systemic infection
Native Valve
vs Noninfective Causes ... bacilli • Fungi ... bacilli • Fungi ... #Differential # ... Diagnosis
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
culture negative ... Tropheryma whipplei, Fungi ... #differential # ... diagnosis #causes ... #Endocarditis #InfectiousDiseases
Septic Arthritis - Pathogens and Clinical Clues

Staphylococcus aureus 
Streptococcal spp. 
Neisseria gonorrhoeae 
Aerobic/Anaerobic 
Gram-negative bacteria 
Brucellosis
Pathogens and Clinical Clues ... Anaerobic Gram-negative ... Fungal spp. ... Arthritis #Pathogens #Differential ... #Diagnosis
Causes of Relative Bradycardia - Note the propensity for intracellular organisms.
Infectious: 
Legionella, Psittacosis, Q fever, Typhoid
Causes of Relative ... Drug fever #relative ... #bradycardia #Causes ... #differential # ... diagnosis #infectiousdiseases
Rigors And Bacteremia - Overview

• Rigors are a response to the release of cytokines and prostaglandins
PATHOPHYSIOLOGY: ... Double-stranded RNA • Fungi ... Mannan and glucan components ... #InfectiousDiseases ... #Diagnosis
Fungal Biomarkers: Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 • Pathogens:
Polysaccharide cell wall component ... Coccidioides - Negative ... Cryptococcus - Negative ... BAL GM does not differentiate ... Galactomannan #diagnosis
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
but important causes ... BCNIE Diagnostic ... #Endocarditis #diagnosis ... #differential # ... workup #infectiousdiseases