30 results
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
intermediate risk of disease ... because false-negative ... sample = 95% • A negative ... Testing #Diagnosis #Workup ... #InfectiousDiseases
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture Negative ... as a cause of a negative ... Sweet's Syndrome, hidradenitis ... Autoimmune: Crohn's disease ... Differential #Diagnosis #InfectiousDiseases
Tularemia - Diagnosis and Management Summary
Francisella tularensis - Aerobic fastidious gram-negative Coccobacillus - Zoonotic Infection
 •
fastidious gram-negative ... Culture & GS, PCR Treatment ... : • Severe Disease ... #infectiousdiseases ... #microbiology
Psittacosis 
Pathogen: Chlamydia psittaci - obligate intracellular gram negative
Transmission:
 • Birds are the primary reservoir
 •
intracellular gram negative ... danger of aerosol) Treatment ... first line of treatment ... Chlamydia #psittaci #microbiology ... #infectiousdiseases
Septic Arthritis - Diagnosis and Management Summary
Clinical Exam: hot, swollen, pain with passive AND active ROM
with passive AND active ... necrosis, Lyme disease ... viral arthritis Workup ... arthritis diagnosis Treatment ... staphylococcus, gram negative
Listeriosis Summary - Listeria Monocytogenes
Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming
Risk
Gastroenteritis → Invasive disease ... culture (Invasive disease ... diagnosis #management #infectiousdiseases ... #treatment #microbiology
Listeriosis Summary - Listeria Monocytogenes
Pathogen: Listeria Monocytogenes - Gram-positive rod, Aerobic, facultative anaerobe, motile, beta-hemolytic, Non-spore-forming
Risk
Gastroenteritis → Invasive disease ... culture (Invasive disease ... diagnosis #management #infectiousdiseases ... #treatment #microbiology
Commonly Used Diagnostic Tests for Celiac Disease

Tissue transglutaminase (tTG) IgA antibodies
 - Most reliable noninvasive test
specificity - Falsely negative ... ) - May be negative ... HLA-DQ8 - High negative ... Reflects response to treatment ... Tests #Diagnosis #Workup
IgG4-Related Disease
Clinical history:  Man, 60 years, multiorgan involvement, unique or multiple inflammatory pseudotumor
4 phenotypes:
 •
IgG4-Related Disease ... • Some false negative ... monoclonality • "Reactive ... IgG4 #Related #Disease ... management #phenotypes #workup
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
infections • Gram-negative ... fusiform gram-negative ... Treatment: • 50% ... Capnocytophaga #canimorsus #microbiology ... #zoonotic #infectiousdiseases