113 results
HACEK is the acronym commonly used to describe and help doctors to remember a group of
fastidious Gram-negative ... which can also cause ... endocarditis is caused ... endocarditis is caused ... #Diagnosis #InfectiousDiseases
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
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood ... culture negative ... #differential #diagnosis ... #negative #Endocarditis ... #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 ... #differential #diagnosis ... #causes #infectiousdiseases
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... - Differential Diagnosis ... antibiotics as a cause ... #Differential #Diagnosis ... #InfectiousDiseases
Sebaceous hyperplasia 
 - Yellow papule 
 - Donut-shape 
 - Central umbilication 
 - Telangiectasia
Usually multiple - Causes ... #Dermatology #Diagnosis ... #Benign #Clinical ... #Photo
Point-of-care Ultrasound for Diagnosis of Abscess in Skin and Soft Tissue Infections

1. POCUS is more accurate
Ultrasound for Diagnosis ... cellulitis in cases ... abscess is not clinically ... POCUS has a negative ... LikelihoodRatios #Accuracy #Diagnosis
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
individual studies Clinical ... diseases, describe clinical ... 100%, then all negative ... proportion of negative ... #calculations #diagnosis
Septic Arthritis - Pathogens and Clinical Clues

Staphylococcus aureus 
Streptococcal spp. 
Neisseria gonorrhoeae 
Aerobic/Anaerobic 
Gram-negative bacteria 
Brucellosis
Pathogens and Clinical ... Clues Staphylococcus ... Anaerobic Gram-negative ... #Differential #Diagnosis
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
result with no clinical ... testing (TST) False-negative ... because false-negative ... sample = 95% • A negative ... LatentTB #ActiveTB #InfectiousDiseases