63 results
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
Tuberculin skin testing ... (TST) False-negative ... because false-negative ... sample = 95% • A negative ... LatentTB #ActiveTB #InfectiousDiseases
Causes of Proteinuria - Differential Diagnosis Algorithm
Persistent Proteinuria >150mg/d protein present on repeat testing including overnight
present on repeat testing ... including overnight testing ... Tubular Proteinuria (Negative ... HSP • Post-infectious ... #Proteinuria #Nephrology
Causes of Relative Bradycardia - Note the propensity for intracellular organisms.
Infectious: 
Legionella, Psittacosis, Q fever, Typhoid
Causes of Relative ... Infectious: Legionella ... spotted fever, Non-infectious ... #bradycardia #Causes ... differential #diagnosis #infectiousdiseases
Estimated Timeline for Detection of SARS-CoV-2 Infection Relative to Symptom Onset

#COVID19 #SARSCOV2 #PCR #Serology #Antibodies #Antibody
of SARS-CoV-2 Infection ... Relative to Symptom ... SARSCOV2 #PCR #Serology ... Antibody #Laboratory #Testing
Transplant Infections Timeline
Pre-transplant:
 • Common bacteria (endogenous): Staphylococci (skin), Gram-negative bacilli (gut)
 • Viruses: HSV (reactivation)
Engraftment:
Transplant Infections ... Staphylococci (skin), Gram-negative ... #Transplant #Infections ... differential #diagnosis #causes ... #infectiousdiseases
HINTS Exam - Unidirectional Nystagmus - Left-beating

In a patient with vertigo symptoms, this finding is reassuring
Nystagmus - Left-beating ... for a PERIPHERAL cause ... Clinical #Video #Negative ... #Neurology #Peripheral
The head impulse test (HIT) result is positive (abnormal) in nearly all patients with a peripheral
with a peripheral cause ... of AVS and negative ... with a central cause ... #PhysicalExam #Neurology ... #HeadImpulse #Testing
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... antibiotics as a cause ... Dracunculiasis - Non-Infectious ... Blastomycosis - Non-Infectious ... Differential #Diagnosis #InfectiousDiseases
Disseminated Gonococcal Infection - Diagnosis and Management Summary

Bacteremic spread of the Gram-negative diplococci Neisseria gonorrhoeae. History
Disseminated Gonococcal Infection ... spread of the Gram-negative ... susceptibility testing ... • Laboratory testing ... #Microbiology #InfectiousDiseases
Invasive Aspergillus (IA) - Diagnosis and Management
Aspergillus is ubiquitous in nature. Most invasive infections are caused
are caused by members ... , Disseminated infection ... Diagnosis and Testing ... considered in certain cases ... treatment #fungal #infectiousdiseases